https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-intro-equations/v/variables-expressions-and-equations 2023-06-30T02:13:42.781179102Z Variables, expressions, & equations In algebra, we use variables like x, y, and z to represent unknown values. Expressions are combinations of variables and numbers, while equations equate two expressions. Variables can take on different values depending on the context, and we can evaluate expressions by substituting values for the variables. Sal Khan video https://cdn.kastatic.org/googleusercontent/sjn6uuCg_VMBvqgKVdjnKMqrR0Ck6JEoDLwedxMk2E6WGPQzU00r5oY68BHBihk__NPNIC-e29cRLty1sTKrmxEMcA Variables, expressions, & equations In algebra, we use variables like x, y, and z to represent unknown values. Expressions are combinations of variables and numbers, while equations equate two expressions. Variables can take on different values depending on the context, and we can evaluate expressions by substituting values for the variables. https://cdn.kastatic.org/ka-youtube-converted/vDqOoI-4Z6M.mp4/vDqOoI-4Z6M.mp4 415 Algebraic equations basics https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-intro-equations/v/testing-solutions-to-equation 2023-06-30T02:13:42.781179102Z Testing solutions to equations In this math lesson, we learn how to solve an equation with one variable. We test different values for x to see which one satisfies the equation. By substituting x with the given options, we find the correct solution that makes both sides of the equation equal. Practice makes perfect! video https://cdn.kastatic.org/googleusercontent/8O3WoHT1wNlZGrmEncfinp2VFck55vufiiTGcSmbSaIojphoIUKbbyIIbpAUqy-PQGSjpz4FngK85DGMgElX2-tU Testing solutions to equations In this math lesson, we learn how to solve an equation with one variable. We test different values for x to see which one satisfies the equation. By substituting x with the given options, we find the correct solution that makes both sides of the equation equal. Practice makes perfect! https://cdn.kastatic.org/ka-youtube-converted/U9OfQd8poTQ.mp4/U9OfQd8poTQ.mp4 225 Algebraic equations basics https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-intro-equations/a/introduction-to-equations 2021-12-16T15:37:07.463764128Z Intro to equations Learn what an equation is and what it means to find the solution of an equation. article https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-intro-equations/e/testing-solutions-of-equations-inequalities 2026-04-09T15:00:37.748529754Z Testing solutions to equations Practice plugging in values to equations and checking to see if the equations hold true. Ben S. exercise 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 Algebraic equations basics