SME
Grade 9 Math
Solving linear equations and literal equations (rearranging formulas)
The main lesson, then each kind of problem it solves.
Solving linear equations and literal equations (rearranging formulas)
Main lesson
Distribute first
Use this for “2(3x − 4) = 4x + 2” (numbers after distributing up to 10).
Solve a formula for a letter
Use this for “Solve P = 2l + 2w for w.”
Solve ax + by = c for y
Use this for “Solve 2x + 3y = 12 for y. What is y when x = 3?”
How many solutions?
Use this for “Which equation has exactly one solution, no solution, or infinitely many?”