You are using a photocopy machine to reduce an advertisement that is 14 in. wide by 21 in. long. If the new width is to be 8 in., what will the new length be

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You are using a photocopy machine to reduce an advertisement that is 14 in. wide by 21 in. long. If the new width is to be 8 in., what will the new length be
Set this up as a proportion;we will call the new length x since we don't know what that is;
{{{14/21=8/x}}}
cross multiply;
14x=8(21)
14x=168
x=12
:)

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