9 times a number plus 21 is equal to 6 times the number minus 45. Find the number.

Answer 1

9n - 21 = 6n-45

3n-21 = -45

3n = -24

n = -8

Answer 2

9x-21 = 6x-45

-6x -6x

3x - 21= -45

+21 +21

3x = -24

Divide both sides of equation by 3

X= -8 (When you divide a negative by a positive, you get a negative answer)