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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 5 Page 253

Use the Addition Property of Equality to eliminate the subtraction.

k=4

Practice makes perfect

To solve the equation, we have to isolate k on one side. Using the Addition Property of Equality, we will add 3 to both sides of the equation. This will eliminate the subtraction and isolate k.

k-3=1

LHS+3=RHS+3

k-3+3=1+3

Add terms

k=4

To check that this solution is correct, let's substitute k=4 into the original equation and simplify.

k-3 =1

k= 4

4-3? =1

Subtract term

1 = 1 ✓

Since the left-hand side and right-hand side are equal, k=4 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