Question

If the sum of a number and seven is doubled the result is six less than the number findvthe number

Answer 1

n = -20

Explanation:

(n + 7)2 = n - 6

2n + 14 = n - 6

14 = -n - 6

20 = -n

Checking my answer

(-20 + 7)2 = -20 - 6

(-13)2 = -26

-26 = -26