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value of x + y

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value of x + y

by Xbond » Sat Aug 22, 2009 9:38 am
Hi there,

Could you explain the concept of this DS in simplest way

If x and y are positive integers, what is the value of x + y ?

(1) 2expo(x).3expo(y) = 72
(2) 2expo(x).2expo(y) = 32
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by iamjakekim » Sat Aug 22, 2009 9:46 am
Break down to 2's and 3's.

stm1.

2^x mult 3^y = 72

break 72 down to 2 and 3's. 2 2 2 3 3
so we get X + Y = 5

SUF

stm 2.

same thing 2^x mult 2^y = 36

2 2 2 2 2 = 32

x + y = 5

SUF

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