9 (3х -7)+3 (8х -11)=3 (9х +8)
27x-63+24x-33=27x+24 27x-27x+24x= 63+33+24 24x= 120 x=5
(27x-63)+(24x-33)=27x+24 27x-27x+24=63+33+24 24x=120 X=120:24 X=5