Question

решите уравнение x-1=7(x-1)

Answer 1

x-1=7x-7
x-7x=-7+1
-6x=-6
x=1

Answer 2

1) х-1=7*(х-1)
х-1=7х-7
7-1=7х-х
6=6х
х=6:6
х=1.