A two digit number is four times the sum of its digits. If 27 is added to the number, it becomes seven times the sum of the digits. What is the two digit number?
A. 24 B. 12 C. 48 D. 36
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Answer:
4(x+y)+27=7(x+y)
27=3(x+y)
9=x+y
as per options the answer is 36
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