https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/v/why-we-do-the-same-thing-to-both-sides-simple-equations 2023-06-14T19:01:04.581019455Z Same thing to both sides of equations In this fun math problem, we have a balanced scale with a mystery mass on one side and several 1-kilogram masses on the other. To find the mystery mass, we remove the same number of 1-kilogram masses from both sides, keeping the scale balanced. Then, we can easily determine the mystery mass's weight. Sal Khan video https://cdn.kastatic.org/googleusercontent/mDbW5Kliflbv-kdPwZxHt6-TvT7sOetoTp5u49jMZCRw9jyGA5dZTjuSAJVsBfLD_oEbnP_nBWgEloxxDS0uDGA Same thing to both sides of equations In this fun math problem, we have a balanced scale with a mystery mass on one side and several 1-kilogram masses on the other. To find the mystery mass, we remove the same number of 1-kilogram masses from both sides, keeping the scale balanced. Then, we can easily determine the mystery mass's weight. https://cdn.kastatic.org/ka-youtube-converted/5FBDqY41GjU.mp4/5FBDqY41GjU.mp4 152 One-step equations intuition https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/v/representing-a-relationship-with-a-simple-equation 2023-06-30T02:13:42.781179102Z Representing a relationship with an equation In this lesson, we learn about balancing scales and solving equations. We discover that to find a mystery mass, we can set up an equation using equal signs and balance both sides. By subtracting the same amount from each side, we can solve for the unknown mass, helping us understand the relationship between the two sides of the scale. Sal Khan video https://cdn.kastatic.org/googleusercontent/IFLGgA9RIMTjYoG_ClYp-VrgjWcI3SX0N8kkzPi3JbXIcHCRIRqmBFrdESNQ0gTG78uDv4v7vqF7F6fgtbRulICk Representing a relationship with an equation In this lesson, we learn about balancing scales and solving equations. We discover that to find a mystery mass, we can set up an equation using equal signs and balance both sides. By subtracting the same amount from each side, we can solve for the unknown mass, helping us understand the relationship between the two sides of the scale. https://cdn.kastatic.org/ka-youtube-converted/XN48Ba9Ncr8.mp4/XN48Ba9Ncr8.mp4 204 One-step equations intuition https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/v/intuition-why-we-divide-both-sides 2023-08-12T01:26:06.987740894Z Dividing both sides of an equation In this lesson, we learn how to find the mass of a mystery object using a balanced scale. By keeping the scale balanced and taking equal portions from both sides, we can determine the mass of the mystery object. This helps us understand the concept of equality in real-life situations. Sal Khan video https://cdn.kastatic.org/googleusercontent/PGpS9R2B2yRPTrqwhWzTucVOnJmD9_AJXcn_8R3qp7ml6Tc-q6yuQosIEXjqEBsMuNLb97fSalcHm7DalLUgOBaMhg Dividing both sides of an equation In this lesson, we learn how to find the mass of a mystery object using a balanced scale. By keeping the scale balanced and taking equal portions from both sides, we can determine the mass of the mystery object. This helps us understand the concept of equality in real-life situations. https://cdn.kastatic.org/ka-youtube-converted/Ye13MIPv6n0.mp4/Ye13MIPv6n0.mp4 194 One-step equations intuition https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/v/one-step-equation-intuition 2023-06-30T02:13:42.781179102Z One-step equations intuition In this math lesson, we learn how to solve a balance scale problem with unknown mass. We represent the problem using an algebraic equation, 3x = 9, where x is the unknown mass. By dividing both sides by 3, we find that x = 3, meaning each object has a mass of 3 kilograms. Sal Khan video https://cdn.kastatic.org/googleusercontent/hNkL2m5CQTMTDzu21O9aByC7pPGy8aeBQt0Pd4f6iIru01VsOFpn0Gr74JXY9i-vAimlRgF7ZQwhQTIyMVZC0QX7 One-step equations intuition In this math lesson, we learn how to solve a balance scale problem with unknown mass. We represent the problem using an algebraic equation, 3x = 9, where x is the unknown mass. By dividing both sides by 3, we find that x = 3, meaning each object has a mass of 3 kilograms. https://cdn.kastatic.org/ka-youtube-converted/kbqO0YTUyAY.mp4/kbqO0YTUyAY.mp4 279 One-step equations intuition https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/e/identify-and-solve-equations-from-visual-models 2026-07-02T18:20:48.459369679Z Identify equations from visual models (tape diagrams) Identify the equation represented by a tape diagram. Then, solve for the unknown in the equation. Lindsay exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/e/identify-equations-from-visual-models 2025-09-17T22:00:43.586895114Z Identify equations from visual models (hanger diagrams) Identify the equation represented by a  hanger diagram. Then, solve for the unknown in the equation. Lindsay exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-solving-equations/e/visualize-equations 2023-12-11T22:10:22.66384181Z Solve equations from visual models Use a visual model of an equation to solve for the unknown in the equation.   Lindsay exercise