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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 1 Page 4

Use the Subtraction Property of Equality to eliminate the constant on the left-hand side of the equation.

b=- 7

Practice makes perfect

To solve the equation, we have to isolate b on one side. Using the Subtraction Property of Equality, we will subtract 2 from both sides of the equation.

b+2=- 5

LHS-2=RHS-2

b+2-2=-5-2

Subtract terms

b=- 7

To check that this solution is correct, let's substitute b= - 7 into the original equation and simplify.

b+2=- 5

b= - 7

- 7+2? =- 5

Add terms

- 5=- 5 ✓

Since the left-hand side and right-hand side are equal, b=- 7 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