8x (40+7) = (8x?) + (8x7) what does the ? stand for?

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asked Jun 7, 2015 89.0k views

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8x (40+7) = (8x?) + (8x7) what does the ? stand for?

Mathematics
middle-school

Darren Alfonso asked

by Darren Alfonso

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$8 * (40+7) = (8*x) + (8*7) \\ \\ 8(47)=8x+56 \\ \\ 376=8x+56 \\ \\ 320=8x \\ \\ 40=x$

Scott Carey answered Jun 11, 2015

by Scott Carey

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