5(3-2y)-4(9-y)=3(y+5)
15-10y-36-4y=3y+15
-10y-4y-3y=15-15+36
-17y=36
y=36 раздели на -17 =2,1176...
14(2х-3)-5(х+4)=2(3х+5)+5х
28x-42-5x-20=6x+10+5x
28x-5x-6x-5x=10+42+20
12x=72
x=6
9(3х-7)+3(8х-11)=3(9х+8)
27x-63+24x-33=27x+24
27x+24x-27x=24+63+33
24x=120
x=5
6(7х-11)-13(х-6)=14(2х+1)
42x-66-13x+78=28x+14
42x-13x-28x=14+66-78
x=2