219 - 7 . ( x+1) = 100
7 . ( x + 1 ) = 219 - 100 = 119
x+ 1= 119:7= 17
x = 17-1=16
(3x - 6 ). 3100 = 3103 2018x-3 = 2018
3x - 6 = 3103 : 3100 2018x-3 = 20181
3x - 6 = 33 =27 Do x-3=1 cho nên suy ra x=4
3x = 27 + 6
3x = 33
x = 33:3
x = 11
a: =>7(x+1)=119
=>x+1=17
=>x=16
b: =>3x-6=27
=>3x=33
=>x=11
c: =>x-125+2=0
=>x=123
d: =>x-3=1
=>x=4