( 2x - 27 ) + 17 = x - 27
2x - 27 + 17 = x - 27
2x - x = 27 - 27 + 17
x = 17
=> 2x-27+17 = x-27
=> 2x-10 = x-27
=> 2x-10+27 = x
=> 2x+17 = x
=> x-2x = 17
=> -x = 17
=> x=-17
Vậy x=-17
Tk mk nha
( 2x - 27 ) + 17 = x - 27
2x - 27 + 17 = x - 17
2x - x = -17 - 17 + 27
x = -34 + 27
x = -7
<=> 2x-27 + 17 = x- 27
<=> 2x-x=-27+27-17
<=> x=-17
( 2x - 27 ) + 17 = x - 27
=> 2x -27 + 17 = x - 27
=> 2x - x + 17 = -27 + 27 - 17
=> x = 0 - 17
=> x = -17
Vậy :...
Xin lỗi,mk sửa lại :
( 2x - 27 ) + 17 = x - 27
=> 2x - 27 + 17 = x - 27
=> 2x - x = -27 + 27 - 17
=> x = 0 - 17
=> x = -17