Question

Resolva a equaçao= 5[3-x]-4x=18

Answer 1

5(3-x)-4x = 18
15-5x-4x = 18
15-9x = 18
-9x = 3
9x = -3
x = -3/9
x = -1/3

É isso ;)

Answer 2

5 ( 3 - x) - 4x =18

15 - 5x - 4x = 18

- 5x - 4x = 18 - 15

- 9x = 3 (-1)

9x = - 3

x = - 3/9