SOLUTION: Think of a pair of a number. if added 9 to the first, obtain a number which is twice the second. If 20 added to the second, obtain a number which is 4 times of First. What are the

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Question 412276: Think of a pair of a number. if added 9 to the first, obtain a number which is twice the second. If 20 added to the second, obtain a number which is 4 times of First. What are the numbers?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Let x and y represent the first and second numbers respectively

Question states*** 

 x+ 9 = 2y    OR x = 2y-9

 y + 20 = 4x

 y+20 = 4(2y-9)

   56 = 7y

   y = 8 and x = 7  (2*8-9)



CHECKING our Answer***

 8 + 20 = 4*7