Решите уравнение: 7y-4(3y+5)=2-3(4y-9) ; 5(3-2y)-4(9-y)=3(y+5).

7y-4(3y+5)=2-3(4y-9) ; 7y-12y-20=2-12y+27  7y=20+2+27 7y=49 y=49/7 y=7;  5(3-2y)-4(9-y)=3(y+5) 15-10y-36+4y=3y+15 -10y-3y+4y=15-15+36 -9y=36 y=-36/9 y=-4