Question

Which of the following represents "two times the sum of a number and fifteen is equal to six times the number"?

a. 2N+15= 6N
b. 2(6N + 15) = N
c. 2(N + 15) = 6N

Answer 1

2(N+15) = 6N

Explanation:

I took the test

Answer 2

Answer: 2(N+15) = 6N

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We let N be the number.
Then, "the sum of a number and fifteen" would be

N + 15

Two times this sum would give us

2(N+15) ... you must distribute!

This must be equal to six times the number. Six times the number is 6N, therefore

2(N+15) = 6N