Question

2x+21=3x-6
12(x-2)=1-x
x+5x-4=18-2x

Answer 1

a. 2x+21=3x-6

2x - 3x = -6 -21

-x = -27

x = 27

b. 12(x-2)=1-x

12x - 24 = 1 - x

12x + x = 1 + 24

13x = 25

x = 25/13

c. x+5x-4=18-2x

6x - 4 = 18 - 2x

6x + 2x = 18 + 4

8x = 22

x = 11/4