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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
3. Solving Two-Step Equations
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Exercise 12 Page 141

Use the Multiplication Property of Equality.

C

Practice makes perfect
We are given the equation and we want to describe how to solve it. n/4 = 12

To solve the equation we need to remove the division by 4 from left-hand side of the equation. We will use the Multiplication Property of Equality.

Multiplication Property of Equality

Multiplying each side of an equation by the same number produces an equivalent equation.

Let's multiply both sides of the equation by 4.
n/4 = 12
MultEqn

LHS * 4=RHS* 4

n/4* 4 = 12 * 4
MoveRightFacToNum

a/c* b = a* b/c

4n/4 = 12 * 4
CancelCommonFac

Cancel out common factors

4n/4 = 12* 4
SimpQuot

Simplify quotient

n = 12 * 4
Multiply

Multiply

n = 48
We solved the equation by multiplying each side by 4. This corresponds to option C.
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arrow_right Try It p.140-141
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Try It 2 (Page 140)
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arrow_right Self-Assessment for Concept & Skills p.141
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Self-Assessment for Concept & Skills 11 (Page 141)
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arrow_right Self-Assessment for Problem Solving p.142
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arrow_right Review & Refresh p.143
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