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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

1. Solving Simple Equations

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Exercise 13 Page 6

Use the Addition Property of Equality.

w=- 2

Practice makes perfect

To solve the equation, we have to isolate w on one side. Using the Addition Property of Equality, we will add 3 to both sides of the equation. This will eliminate the constant on the right-hand side of the equation and isolate w.

- 5=w-3

LHS+3=RHS+3

- 5+3=w-3+3

Add terms

- 2=w

Rearrange equation

w=- 2

To check that this solution is correct, let's substitute w= - 2 into the original equation and simplify.

- 5=w-3

w= - 2

- 5 ? = - 2-3

Subtract term

- 5=- 5 ✓

Since the left-hand side and right-hand side are equal, w=- 2 is the correct solution.

Subchapter links

Try It p.4-6

Self-Assessment for Concepts & Skills p.6

Self-Assessment for Problem Solving p.7

Review & Refresh p.8

Concepts, Skills, & Problem Solving p.8-10