Решите уравнения

3x-1=2 (x-2)

3 (x+5) = 7-5x

19 (y-9) = 3 (y+7)

4 (x-9) = 3 (x-8)

1. 3x-1=2 (x-2)

3x-1=2x-4

3x-2x=-4+1

x=-3

2. 3 (x+5) = 7-5x

3x+15=7-5x

3x+5x=7-15

8x=-8

x=-1

3. 19 (y-9) = 3 (y+7)

19y-171=3y+21

19y-3y=21+171

16y=192

y=12

4. 4 (x-9) = 3 (x+8)

4x-36=3x+24

4x-3x=24+36

x=60