5(3-2у)-4(9-у)=3(у+5)
15-10у-36+4у=3у+15
15-36-15=3у+10у-4у
-36=9у
у=-36:9
у=-4
14(2х-3)-5(х+4)=2(3х+5)+5х
28х-42-5х-20=6х+10+5х
28х-5х-6х-5х=42+20+10
12х=72
х=72:12
х=6
9(3х-7)+3(8х-11)=3(9х+8)
27х-63+24х-33=27х+24
27х+24х-27х=63+33+24
24х=120
х=5
6(7х-11)-13(х-6)=14(2х+1)
42х-66-13х+78=28х+14
42х-13х-28х=66-78+14
х=2