Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Solving Equations Using Addition or Subtraction
Continue to next subchapter

Exercise 16 Page 131

To solve the equation, we have to isolate x on one side. Using the Subtraction Property of Equality, we will subtract 4 from both sides of the equation. This will eliminate the addition and isolate x.

x + 4 = - 14
x + 4 - 4 = - 14 - 4
x = - 18

To check that this solution is correct, let's substitute x = - 18 into the original equation and simplify.

x + 4 = - 14
- 18 + 4 ? = - 14
- 14 = - 14 ✓

Since the left-hand side and right-hand side are equal, x = - 18 is the correct solution.