155 - 10 .( x+1 ) = 55
155 - 55 = 10 ( x + 1 )
100 = 10 ( x + 1 )
100 : 10 = x+ 1
10 = x + 1
10 - 1 = x
9 = x
Vậy x = 9
155-10(x+1)=55
10(x+1)=155-55
10(x+1)=100
x+1=100/10
x+1=10
x=9
155 - 10 .( x+1 ) = 55
10(x+1)=155-55
10(x+1)=100
x+1=100:10
x+1=10
x =10-1
x =9
155 - 10 .(x + 1) =55
10 .(x+1)=155 =55
10.(x+1) =100
x+1 = 100/10
x+1= 10
x=10-1
x=9
155 - 10 ( x + 1 ) = 55
10 ( x + 1 ) = 155 - 55
10 ( x + 1 ) = 100
x + 1 = 100 : 10
x + 1 = 10
x = 9
2 . ( 3x - 8 ) = 64 / 32
