(2x-7)- (x+135)=0
2x-7 = 0 + x + 135
2x - 7 = x + 135
2x - x = 135 +7
x = 142
Vậy x = 142
(x2-7)-(x+135)=0
=> 2x - 7 = x + 135
=> 2x - x = 135 + 7
=> x = 142
Vậy x = 142
(2x-7)-(x+135)=0
2x-7 = x+135
2x-x = 135+7
1x = 142
x = 142 : 1
x = 142
vậy x = 142
nhé Bạch Diệp