1. Math-7 NOTES Solving Equations: Addition Equations: x + 8 = 2
DATE: ______/_______/_______
What: One-step equations (Addition & Subtraction)
Why: To solve addition and subtraction one-step equations using both algebra tiles
and the traditional paper/ pencil method.
NAME:
Solving Equations:
GOAL: To get the variable by itself (“isolating” the variable)!!
RULE: What you do to one side of the equals (=) sign, you MUST do to the other side!
Addition Equations:
x = 2
x + (-3) = 7
40 + x = ) x = ) = x + (-75)
Paper/Pencil Method:
Paper/Pencil Method:

2. Remember– “minus a negative” equals a POSITIVE!!
Subtraction Equations:
x – 4 = 7
x – 3 = -2
x – 22 = ) x – 64 = ) x – 34 = -3
Paper/Pencil Method:
Paper/Pencil Method:
Remember– “minus a negative” equals a POSITIVE!!
What about the “double negative” equations?
6) x – (-2) = 5 7) x – (-9) = ) – (-x) = 15

3. “Addition/ Subtraction
Math-7 PRACTICE
DATE: ______/_______/_______
NAME:__________________________
“Addition/ Subtraction
one-step equations”