- Choice D$$x + y = 15 ---(1)$$ $$x – y = 9---(2)$$ $$(1)+(2)$$ $$2x=24$$ $$x=12$$ $$y=3$$ $$xy=12(3)=36$$
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- Choice D$$x + y = 15 ---(1)$$ $$x – y = 9---(2)$$ $$(1)+(2)$$ $$2x=24$$ $$x=12$$ $$y=3$$ $$xy=12(3)=36$$
## Skills you are tested for:

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