Question 146986
I'll do the first and third to get you started



# 1

{{{xy(x-y) }}} Start with the given expression


{{{x^2y-xy^2 }}} Distribute



# 3




{{{15-3y=2y+5}}} Start with the given equation.



{{{-3y=2y+5-15}}} Subtract {{{15}}} from both sides.



{{{-3y-2y=5-15}}} Subtract {{{2y}}} from both sides.



{{{-5y=5-15}}} Combine like terms on the left side.



{{{-5y=-10}}} Combine like terms on the right side.



{{{y=(-10)/(-5)}}} Divide both sides by {{{-5}}} to isolate {{{y}}}.



{{{y=2}}} Reduce.



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Answer:


So the answer is {{{y=2}}}