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Solving an Equation Using Transposition

XXX + XXV =

Question

XXX + XXV =

A

LL

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B

XX

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C

LV

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Solution

The correct option is C LV
XXX = 10 + 10 + 10 = 30
XXV = 10 + 10 + 5 = 25

Thus, XXX + XXV = 30 + 25 = 55

But, 55 = 50 + 5 = L + V = LV

Thus, XXX + XXV = LV

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