Question

respondam por favor !!!! me ajudem

Answer 1

A) 2x - 3 = 15          
2x = 15 + 3                  
2x = 18 
x = 18/2
x = 9

B) 3x + 12 = 51
3x = 51 - 12
3x = 39
x = 39/3
x = 13

C) 7x - 1 = 13
7x = 13 + 1
7x = 14
x = 14/7
x = 2

D) 4x + 2 = -18
4x = -18 -2
4x = -20
x = -20/4
x = 5