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 Ecuación de un solo paso 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 2026-04-09T15:30:42.474940236Z 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/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 https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/v/variables-and-expressions-1 2023-06-11T20:09:24.00592199Z Evaluating an expression with one variable In this math lesson, we explore the expression 5 t plus 3 to calculate the cost of participating in a hospital raffle fundraiser. By evaluating the expression for different values of t, the number of tickets purchased, we find the costs for buying 1, 8, and 10 tickets, which are 8, 43, and 53 dollars, respectively. Sal Khan video https://cdn.kastatic.org/googleusercontent/uIAXUtdyJRfQMcSwOvbNBBbvYyFxGpIsznKE9aM5HHsUTWfdzOTNmL_BQHea9f9oD_NaMb5EtADwbhHP-x3Orao Evaluating an expression with one variable In this math lesson, we explore the expression 5 t plus 3 to calculate the cost of participating in a hospital raffle fundraiser. By evaluating the expression for different values of t, the number of tickets purchased, we find the costs for buying 1, 8, and 10 tickets, which are 8, 43, and 53 dollars, respectively. https://cdn.kastatic.org/ka-youtube-converted/AJNDeVt9UOo.mp4/AJNDeVt9UOo.mp4 120 Ecuación de un solo paso https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/e/evaluating_expressions_1 2025-03-28T07:05:36.573142233Z Evaluating expressions with one variable Substitute a whole number into an expression with 1 or 2 operations (addition, subtraction, multiplication, and division), and evaluate. Marcia Lee exercise