Verified answer

(x + 7)*(x - y)/(x + 7) = x - y

first rearrange the numerator

x^2 +7x-xy-7y

x(x+7)-y(x+7) (take x and -y common out)

now divide with (x+7)

you will get x-y

x+7 into x^2-xy +7x-7y x-y

x^2 +7x

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-xy-7y

-xy-7y

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