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McGraw Hill Glencoe Algebra 1, 2012 View details

6. Ratios and Proportions

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Exercise 39 Page 115

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

11

Practice makes perfect

To solve the proportion, we will start by using the Cross Products Property. Remember that we will need to treat 2n-4 and 3n+3 as single quantities in the cross multiplication process.

2n-4/5=3n+3/10

CrossMult

Cross multiply

10(2n-4)=5(3n+3)

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

10(2n-4)=5(3n+3)

Distr

Distribute 10

20n- 40 =5(3n+3)

Distr

Distribute 5

20n-40=15n+15