Question

Four times a number is equal to five times the same number plus five. What is the number?

Answer 1

x = -5

Explanation:

4 x (number) = 5 x (number) + 5

in other words...

`4x = 5x + 5 \\ 4x - 5x = 5x + 5 - \: 5x\\ - x = 5 \\ x = - 5`