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Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

Maintaining Mathematical Proficiency

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Exercise 11 Page 461

Solve for the variable by using the Cross Products Property.

x=2

Practice makes perfect

To solve the proportion, we will start by using the Cross Products Property. Remember that we will need to treat x+1 as a single quantity in the cross multiplication process.

x+1/2=21/14

Cross multiply

14(x+1)=2*21

Multiply

14(x+1)=42

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

14(x+1)=42

Distribute 14

14x+14=42

LHS-14=RHS-14

14x=28

.LHS /14.=.RHS /14.

x=2

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Exercises p.461