What is the solution to the equation? 5(8 + 7) = 5 • x + 5 • 7 A. x = 1 B. x = 5 C. x = 7 D. x = 8

asked Mar 5, 2015 124k views

3 votes

What is the solution to the equation? 5(8 + 7) = 5 • x + 5 • 7

A. x = 1 B. x = 5 C. x = 7 D. x = 8

by Ckv

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5 votes

$5(8+7)=5\cdot x+5\cdot7\\\\x=8\\\\Answer:D\\\\5\cdot x+5\cdot7=\underline{5}\cdot x+\underline{5}\cdot7=\underline{5}\cdot(x+7)=5\cdot(8+7)\iff x=8$

PillarOfLight answered Mar 12, 2015

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