Mathematics - Pre-Algebra - Two-step equations - Two-Step Solver
Scaffolded format: Show '4x - 3 = 17'. Step 1: 'Add 3 to both sides: 4x = ___' (20). Step 2: 'Divide both sides by 4: x = ___' (5). 12 problems with decreasing scaffolding (last 4 just show equation and answer blank). Mix: ax+b=c, ax-b=c, x/a+b=c, x/a-b=c. Include negative and decimal answers.