Question

уравнение 12х-7*(х+4)=26-4х

Answer 1

12х-7х+28=26-4х
12х-7х+4х=26-28
х=-2

Answer 2

12Х-7Х-28=26-4Х 12Х-7Х+4Х=26+28 9Х=54 Х=6

Answer 3

12Х-7Х-28=26-4Х
12Х-7Х+4Х=26+28
9Х=54
Х=6
12*6-7*6-28=26-4*6
72-42-28=26-24
           2=2