Question

помогите с номером 3.​

Answer 1

7-12х+4=5-10х 
-12х+10х=5-7-4 
-2х=-6 
х=3 

Answer 2

7-4(3x-1) = 5(1-2x)

7-12x+4 = 5-10x

-12x+10x = 5-11

-2x = -6

x = 3