.
1) 5x + 15 = 100
2) 7 + 12x = 8x - 17
3) 0.8x - 3.2 = 0.5x + 2.8
4) 3x/4 - 0.62 = -5x/8 - 0.4
5) 3(x - 1) = 2(x + 2)
6) (6x + 11) - (4x + 19) = -13
7) 3(x - 5) -2(x + 4) = -5x + 1
8) 2x-3/5 = 9/10
9) x-1/2 = 4+2x/3
10) x-4/2 - x-1/5 = 3
11) 3(5x - 7) = 5(3x + 4)
12) 5(2x + 8) - (10x + 11) = 29
1.
5х=100-15
5х=85
х=17
2.
12х-8х=-17-7
4х=-24
х=-6
5.
3х-3=2х+4
3х-2х=4+3
х=7
7.
3х-15-2х-8=-5х+1
3х-2х+5х=1+15+8
6х=24
х=4
Пошаговое объяснение: