5(3-2у)-4(9-у)=3(у+5) 14(2х-3)-5(х+4)=2(3х+5)+5х 9(3х-7)+3(8х-11)=3(9х+8) 6(7х-11)-13(х-6)=14(2х+1)

1)

15-10у-36+4у=3у+15

15-10у-36+4у-3у-15=0

-9у=36

у=-4

2) 28х-42-5x-20=6x+10+5x

28x-42-5x-20-6x-10-5x=0

12x=72

x=6

3) 27x-63+24x-33=27x+24

27x-63+24x-33-27x-24=0

24x=120

x=5

4) 42x-66-13x+48=27x+14

42x-66-13x+48-27x-14=0

2x=32

x=16