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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 23 Page 256

Use the Addition Property of Equality to eliminate the subtraction.

y= 10

Practice makes perfect

To solve the equation, we have to isolate y on one side. Using the Addition Property of Equality, we will add 7 to both sides of the equation. This will eliminate the subtraction and isolate y.

y-7=3

LHS+7=RHS+7

y-7+7=3+7

Add terms

y=10

To check that this solution is correct, let's substitute y= 10 into the original equation and simplify.

y - 7 =3

y= 10

10 - 7? =3

Subtract term

3=3 ✓

Since the left-hand side and right-hand side are equal, y= 10 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