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When 4 times the number x is added to 12...

When 4 times the number x is added to 12, the result is 8. What number results when 2 times x is added to 7 ?

A

-1

B

5

C

8

D

9

Text Solution

Verified by Experts

Choice B is correct. When 4 times the number x is added to 12, the result is 12 + 4x. Since this result is equal to 8, the equation 12 + 4x = 8 must be true. Subtracting 12 from each side of 12 + 4x = 8 gives 4x = −4, and then dividing both sides of 4x = −4 by 4 gives x = −1. Therefore, 2 times x added to 7, or 7 + 2x, is equal to 7 + 2(−1) = 5.
Choice A is incorrect because −1 is the value of x, not the value of 7 + 2x. Choices C and D are incorrect and may result from calculation errors.
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