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 20 Page 208

Use the Multiplication Property of Equality to eliminate the division.

a = 45, see solution.

Practice makes perfect
Notice that in the given equation a is only present within the numerator of a single fraction. a/6 = 15/2 Let's use the Multiplication Property of Equality and multiply multiply both sides of the equation by 6. This will eliminate the denominator of the fraction and isolate a.
a/6 = 15/2
6 * a/8 = 6 * 15/2
a = 6 * 15/2
a = 90/2
a = 45