9(3х-7)+3(8х-11)=3(9х+8)
27х-63+24х-33=27х+24
27х-27х+24х=24+33+63
24х=120
х=5
6(7х-11)-13(х-6)=14(2х+1)
42х-66-13х+78=28х+14
42х-13х-28х=14-78+66
х=2
9(3х-7)+3(8х-11)=3(9х+8)
27х-63+24х-33=27х+24
27х-27х+24х=24+33+63
24х=120
х=5
6(7х-11)-13(х-6)=14(2х+1)
42х-66-13х+78=28х+14
42х-13х-28х=14-78+66
х=2