Question

12 икс-7×( икс+4)=26-4 икс

Answer 1

12Х-7(Х+4)=26-4Х
12Х-7Х-28=26-4Х
5Х-28=26-4Х
5Х+4Х=28+26
9Х=54
Х=54 : 9
Х= 6

Answer 2

12x -7(x+4) =26 -4x
12x -7x -28 =26 -4x
5x -28 =26 -4x
5x+4x = 26+28
9x = 54
x =54/9
x =6