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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

1. Solve One-Step Addition and Subtraction Equations

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Exercise 2 Page 440

Use the Subtraction Property of Equality to eliminate the addition.

y=5

Practice makes perfect

To solve the equation, we have to isolate y on one side. Using the Subtraction Property of Equality, we can subtract 2 from both sides of the equation. This will eliminate addition on the right-hand side and isolate y.

7=y+2

LHS- 2=RHS- 2

7- 2=y+2- 2

Subtract terms

5=y

Rearrange equation

y=5

To check that this solution is correct, let's substitute y=5 into the original equation and simplify.

7=y+2

y= 5

7? = 5+2

Add terms

7=7 ✓

Because the left-hand side and right-hand side are equal, y=5 is the correct solution.

Subchapter links

Guided Practice p.440

Independent Practice p.441-442

H.O.T. Problems p.442

Standardized Test Practice p.442-444

Extra Practice p.443

Common Core Review p.444