<=>100 : (x-1)=10
<=>100 : 10= x-1
<=>10 = x-1
<=> x = 11
100 : (x - 1) - 5 = 5
100 : (x - 1) - 5 = 5
100 : (x - 1) = 5 + 5
100 : (x - 1) = 10
x - 1 = 100 : 10
x - 1 = 10
x = 10 + 1
x = 11
Vậy x = 11
Ủng hộ mk nha ^_^
100 : (x - 1) - 5 = 5
100 : (x - 1) = 5 + 5
100 : (x - 1) = 10
x - 1 = 100: 10
x - 1 = 10
x = 10 + 1
x = 11
100 : ( x - 1 ) - 5 = 5
100 : ( x - 1 ) = 5 + 5
100 : ( x - 1 ) = 10
( x - 1 ) = 100 : 10
( x - 1 ) = 10
x = 10 + 1
x = 11