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?/? X 45 = 4/5 of ? = ?
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?/? X 45 = 4/5 of ? = ?

User Samash
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Explanation:


(4)/(5) of \: x = 45 \\ (4)/(5) * x = 45 \\ cross \: multiply


(4x)/(5) = 45 \\ 4x = 45 * 5 \\ 4x = 225 \\ divide \: both \: sides \: by \: 4


(4x)/(4) = (225)/(4) \\ x = 56.25

User KateMak
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