Verified answer

Ответ:

5y+7(3-y)=3(5-2y)-6

5y+21-7y=15-6y-6;

5y-7y+6y=15-6-21;

4y=-12;

y=-3

7y-4(3y+5)=2-3(4y-9);

7y-12y-20=2-12y+27;

7y=2+20+27;

7y=49

y=7

9(3x-7)+3(8x-11)=3(9x+8);

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

24x=24+63+33;

24x=120;

x=5

6(7x-11)-13(x-6)=14(2x+1);

42x-66-13x+78=28x+14;

42x-13x-28x=14+66-78;

x=2