Question

1. A number subtracted from 8 is the same as the sum of 3 times a number and 4. What is

the number?

Answer 1

Number = -1

Explanation:

8 - x = 3(x + 4)

8 - x = 3x + 12 ( /+x / -12 on both sides)

8 - 12 - x + x = 3x + x + 12 - 12

-4 = 4x (/ divide by 4)

-4/4 = 4x/4

-1 = x