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Envision Math 2.0: Grade 6, Volume 1

EM

Envision Math 2.0: Grade 6, Volume 1 View details

5. Write and Solve Equations with Rational Numbers

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Exercise 21 Page 206

Use the Multiplication Property of Equality to eliminate the coefficient.

y = 32

Practice makes perfect

To solve the equation, we have to isolate y on one side. Let's use the Multiplication Property of Equality and multiply both sides of the equation by the reciprocal of 18 that is 81.

1/8 * y = 4

LHS * 8/1=RHS* 8/1

8/1 * 1/8 * y = 8/1 * 4

MultFracByInverse

a/b* b/a=1

1 * y = 8/1 * 4

Identity Property of Multiplication

y = 8/1 * 4

a/1=a

y = 8 * 4

Multiply

y = 32

Subchapter links

Do You Understand? p.205

Do You Know How? p.205

Assessment Practice p.208