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Question

If 4(xy) = 64 and 5(x+y) = 3125, then x is equal to
  1. 2
  2. 5
  3. 3
  4. None of these
  5. 4


Solution

The correct option is E 4
4(xy)=64,4(xy)=43xy=3(15(x+y)=3125,x+y=55x+y=5(2
 From (1 and (2
2x = 8
x = 4

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