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Pearson Geometry Common Core, 2011

PG

Pearson Geometry Common Core, 2011 View details

Chapter Review

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Exercise 9 Page 481

You can solve for the variable by using cross products.

6

Practice makes perfect

To solve the proportion, we will start by using cross products. Remember that we will need to treat x+4 as a single quantity in the cross multiplication process.

x/3=x+4/5

Cross multiply

x(5)=3(x+4)

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

x(5)=3(x+4)

Multiply

5x=3(x+4)

Distribute 3

5x=3x+12

LHS-3x=RHS-3x

5x-3x=12

Subtract terms

2x=12

.LHS /2.=.RHS /2.

x=6