Question

-90 times the difference between a number and 83 is equal to the number plus -99

Answer 1

x = 83.2

Explanation:

Let the unknown number be x

-90 * (x - 83) = x + (-99)

-90x + 7470 = x - 99

Subtract x from both sides

-90x - x + 7470 = x - x - 99

-91x + 7470 = -99

Subtract 7470 from both sides

-91x + 7470 - 7470 = -99 -7470

-91x = -7569

Divide both sides by -91

x = 83.2