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McGraw Hill Glencoe Algebra 1, 2012

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McGraw Hill Glencoe Algebra 1, 2012 View details

1. Solving Inequalities by Addition and Subtraction

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Exercise 80 Page 290

Use the Properties of Equality to isolate the variable.

w=- 10

Practice makes perfect

To solve the equation, we have to isolate w on one side. Using the Multiplication Property of Equality, we will multiply both sides of the equation by 5. This will eliminate the denominator of the fraction and isolate 2w.

2/5w=- 4

MoveRightFacToNum

a/c* b = a* b/c

2w/5=- 4

LHS * 5=RHS* 5

2w/5* 5=- 20

FracMultDenomToNumber

a/5* 5 = a

2w=- 20

Now, we will use the Division Property of Equality to eliminate the factor 2.

2w=- 20

.LHS /2.=.RHS /2.

w=- 10

The solution to the equation is w=- 10.

Subchapter links

Check Your Understanding p.288

H.O.T. Problems p.289

Standardized Test Practice p.290

Spiral Review p.290

Skills Review p.290