If 3(x y) = 27 and 3(x + y) = 243, then x is equal to:? - ProProfs Discuss
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If 3(x - y) = 27 and 3(x + y) = 243, then x is equal to:?

This question is part of Aptitude Communication Test
Asked by Telliant, Last updated: May 18, 2020

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Telliant

Telliant

Answered Oct 16, 2018

4

3x - y = 27 = 33 x - y = 3 ....(i) 3x + y = 243 = 35 x + y = 5 ....(ii) On solving (i) and (ii), we get x = 4.
 

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