Question

解；(y+17)/5-(3y-7)/4=-2 x/12-1=2x/15

Answer 1

-2 x/12-1=2x/15

-2x/12-2x/15=1

-5x/30-4x/30=1

-9x/30=1

-9x=30

x=-10/3

(y+17)/5-(3y-7)/4=2x/15=-20/45=-4/9

y/5+17/5-3y/4+7/4+4/9=0

4y/20-15y/20=103/20+4/9

-11/20y=1007/180

y=-1007/99

y=-10又17/99