SME
Grade 7 Math
Two-step equations and inequalities
The main lesson, then each kind of problem it solves.
Two-step equations and inequalities
Main lesson
px + q = r with negative numbers
Use this for “3x − 5 = 20” and “15 + 3x = 42”.
p(x + q) = r
Use this for “4 boxes, 12 pens given away from each, 100 left: how many were in a box?”
Two-step inequalities
Use this for “Solve −2x + 1 ≤ 7 and graph it” and “What is the least whole number x with 4x > 19?”
Which equation matches the story?
Use this for “Which equation shows 3 friends each paying x plus a $5 tip each, $30 in all?”
Steps to solve 3x + 2 = 11
Use this for “What do you do first to solve 3x + 2 = 11?”
Equivalent expressions
Use this for “Which expressions are equal to 2x + 6?”