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# help math

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If x and y are positive integers for which 3x + y + xy = 115, then what is x + y?

Jan 5, 2022

#1
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What is x + y?

Hello Guest!

$$3x + y + xy = 115\\ y(1+x)+3x=115\\ y=\frac{115-3x}{1+x}$$

If x = 1 then is y = 56.

!

Jan 5, 2022