1/3（3y-10-7y/2）-1/2（2y-2y+2/3）=y/2-1
2（3y-10-7y/2）-3（2y-2y+2/3）=6(y/2-1)
6y-10+7y-6y+2y+2=3y-6
6y=2
y=1/3