Question

(2x-7)-(x+135)=0

Answer 1

(2x-7)-(x+135)=0 <=> 2x-7=x+135 <=> 2x-x=135+7 <=> x=142

Answer 2

( 2x - 7) - (x + 135)=0

=> 2x -7 -x +135 =0

=>x +128 =0

=>x = - 128

Answer 3

Ta có : ( 2x - 7 ) - ( x + 135 ) = 0 

suy ra: 2x - 7 - x - 135 = 0 

suy ra: 2x - 7 - x = 135

suy ra: x(2 - 1 ) - 7 = 135

suy ra: x(2-1)= 135 + 7 = 142

suy ra:x . 1 = 142 

suy ra : x = 142 : 1 = 142

Vậy ...................................