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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 1 Page 441

Use the Subtraction Property of Equality to eliminate the addition.

a=7

Practice makes perfect

To solve the equation, we have to isolate a on one side. Using the Subtraction Property of Equality, we can subtract 3 from both sides of the equation. This will eliminate addition on the left-hand side and isolate a.

a+3=10

LHS- 3=RHS- 3

a+3- 3=10- 3

Subtract terms

a=7

To check that this solution is correct, let's substitute a=7 into the original equation and simplify.

a+3=10

a= 7

7+3? =10

Add terms

10=10 ✓

Because the left-hand side and right-hand side are equal, a=7 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