Question

помогите плиз 1317 а,б

Answer 1

1 4/9+8
-1/12-1
я думаю так

Answer 2

$\frac{7}{9} x+3= \frac{2}{3}x+5 /*9 \\ 7x+27=6x+45 \\ 7x-6x=45-27 \\ x=18 \\ \\ \\ \frac{2}{3} y- \frac{1}{2} y+2= \frac{1}{4}y-3/*12 \\ 8y-6y+24=3y-36 \\ 8y-6y-3y=-36-24 \\ -y=-60 \\ y=60$