Пошаговое объяснение:
5x -2=2x +7
5x - 2x = 7 + 2
3x = 9
x = 9 : 3
x = 3
10-2(3x+5)=4(x-2)
10 - 6x - 15 = 4x - 8
-5 - 6x = 4x - 8
4x + 6x = 8 - 5
10x = 3
x = 3 : 10
x = 0,3
5(2x-3)-2(3-2x)=15-6(x+1)
10x - 15 - 6 + 4x = 15 - 6x - 6
14x - 21 = 9 - 6x
14x + 6x = 9 + 21
20x = 30
x = 30 : 20
x = 1,5
