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Start by distributing that x.
x(7 -x) > 8
7x + x^2 > 8
x^2 + 7x -8 > 0
(x+8)(x-1) > 0
x = -8
x = 1

Then substitute each back into the original equation, and see which one is true.

where did the 10 come from?

I'going to sleep now...sorry, but glad to help you soon! Bye.

Ok. Thanks night!