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McGraw Hill Glencoe Algebra 1, 2012 View details

6. Ratios and Proportions

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Exercise 38 Page 115

You can solve for the variable by using the Cross Products Property.

- 3

Practice makes perfect

To solve the proportion, we will start by using the Cross Products Property. Remember that we will need to treat 9b-3 and 5b+5 as single quantities in the cross multiplication process.

9b-3/9=5b+5/3

CrossMult

Cross multiply

3(9b-3)=9(5b+5)

From here, we will continue solving for b by using the Distributive Property and the Properties of Equality.

3(9b-3)=9(5b+5)

Distr

Distribute 3

27b- 9 =9(5b+5)

Distr

Distribute 9

27b-9=45b+45