2x+7 = 5x-10
2x-5x = -10-7
-3x = -17
x = (-17):(-3)
x = + 17/3
Răspuns:
2x + 7= 5x-10
7= 5x-2x-10
7= 3x -10
17= 3x
x= 17:3
x=5,66