The sum of eight times a number and seven is twice the number?

Answer 1

Set it up this way:

8n + 7 = 2n

Take 7 away from each side.

8n = 2n - 7

Take 2n away from each side

6n = -7

Divide each side by 6

n = -7/6

To check the answer, replace the n's with -7/6.

8 X -7/6 + 7 = 2 X -7/6

-56/6 + 42/6 = -14/6

-14/6 = -14/6