Question 1051167
{{{x+y/3-2x-y/2=(x-2x)+(2y/6-3y/6)=-x-y/6}}}
OR do you mean different problem?
{{{(x+y)/3-(2x-y)/2=2(x+y)/6-3(2x-y)/6=(2x+2y-6x+3y)/6=(-4x+5y)/6}}}