3 х-1=2 (х-2)

3 (х+5) = 7-5 х

19 (у-9) = 3 (у+7)

4 (х-9) = 3 (х-8)

3 (2 х-9) = 5 (х-4)

7 (3-2 х) = 15 (1-х)

3 х-1=2 (х-2)

3 х-1=2 х-4

3 х-2 х=-4+1

х=-3

3 (х+5) = 7-5 х

3 х+15=7-5 х

3 х+5 х=-15+7

8 х=-8

х=-1

19 (у-9) = 3 (у+7)

19 у-171=3 у+21

16 у=192

у=12

4 (х-9) = 3 (х-8)

4 х-36=3 х-24

4 х-3 х=36-24

х=8

3 (2 х-9) = 5 (х-4)

6 х-27=5 х-20

х=7

7 (3-2 х) = 15 (1-х)

21-14 х=15-15 х

х=-6

3 х-2 х=-4+1

х=-3

3 х+15=7-5 х

8 х=-8

х=+1

19 у-171=3 у+21

16 у=192

у=12

4 х-36=3 х-24

х=12

6 х-27=5 х-20

х=7

21-14 х=15-15 х

х=-6