Question

Duive.

1. Eight is added to a number and the sum is doubled, the result is -11 less than the number. Find
the number

Answer 1

-27

Explanation:

Number be x

Eight added to number: x+8

sum is doubled: 2*(x + 8)

-11 less than number: x -11

2*(x + 8) = x -11

2*x + 2*8 = x - 11

2x + 16 = x - 11

2x - x = -11 -16

x = -27