A 2 digit number is 5 times the sum of the digits if 9 is added to the number its digits are reversed find the number
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Answer: 45
Step-by-step explanation:
10x+y= 5x+5y
5x-4y=0. (1)
10x+y+9=10y+x
9x-9y= 9
x-y=1 (2)
From 1 and 2
y=5 and x=4
No. is 10x+y= 45
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