Khan Academy

Why we do the same thing to both sides: Variable on both sides video

Intro to equations with variable on both sides video

Equations with variables on both sides: 20-7x=6x-6 video

Equations with variables on both sides exercise

Equations with variables on both sides: fractions video

Equations with variables on both sides: decimals & fractions exercise

Equations with the variable in the denominator video

Equations with parentheses video

equations with parentheses exercise

Equations with parentheses: decimals & fractions exercise

Multi-step equations review article

Solving equations & inequalities: Quiz 1