Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
4. Writing and Solving Proportions
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Exercise 15 Page 206

Solve for the variable by using the Cross Products Property.

p = 5

Practice makes perfect
To solve the proportion, we will start by using the Cross Products Property.
6/p = 42/35
6 * 35 = p * 42
210 =42p
From here, we will continue solving for p by using the Division Property of Equality.
210 =42p
210/42 =42p/42
210/42 = p
5 = p
p = 5