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Big Ideas Math: Modeling Real Life, Grade 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

2. Solving Equations Using Addition or Subtraction

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Exercise 6 Page 253

Use the Addition Property of Equality to eliminate the subtraction.

n=14

Practice makes perfect

To solve the equation, we have to isolate n on one side. Using the Addition Property of Equality, we will add 10 to both sides of the equation. This will eliminate the subtraction and isolate n.

n-10=4

LHS+10=RHS+10

n-10+10=4+10

Add terms

n=14

To check that this solution is correct, let's substitute n=14 into the original equation and simplify.

n- 10 =4

n= 14

14-10? =4

Subtract term

4=4 ✓

Since the left-hand side and right-hand side are equal, n=14 is the correct solution.

Subchapter links

Try It p.252-254

Self-Assessment for Concepts & Skills p.254

Self-Assessment for Problem Solving p.255

Review & Refresh p.256

Concepts, Skills, & Problem Solving p.256-258