Решите уравнение

1) 7 (3 х-1) = 5 (х-3)

2) (3 х-8) = - 13+3 (4 х-9)

3) 3 х+2 (2 х-3) = 8-7 (х-2)

1) 7 (3 х-1) = 5 (х-3)

21 х-7=5 х-15

21 х-5 х=15+7

16 х=8

х=8:16

х=0,5

1) 7 (3 х-1) = 5 (х-3)

21 х-7=15 х-15

21 х-15 х=-15+7

6 х=-8

х=-8:6

х=-1,33

2) (3 х-8) = - 13+3 (4 х-9)

3 х-8=-13+12 х-27

3 х-12 х=-13-27+8

-9 х=-32

х=-32: (-9)

х=3,56

3) 3 х+2 (2 х-3) = 8-7 (х-2)

3 х+4 х-6=8-7 х+14

7 х+7 х=8+14+6

14 х=28

х=28:14

Х=2