9 . x + 157 = 256
9 . x = 256 - 157
9. x = 99
x = 99 : 9
x = 11
9*x + 157 = 256
=>9*x =256 - 157
=99
=>x =99:9
=11
Ta có: 9 x X + 157 = 256
=> 9 x X = 256 - 157
=> 9 x X = 99
=> X = 99 : 9
=> X = 11
Vậy X = 11
9 . x + 157 = 256
9 . x = 256 - 157
9 . x = 99
x = 99 : 9
x = 11