The sum of a 2-digita number is 7 if the difference of 2 digit number and number obtained by reversing the digit is 9,then find the number
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Answer: let the nos be x,y
x+y =7.....…....…...….(1)
10x+y-(10y+x)=9
9x-9y=9
x-y=9........................(2)
(1) + (2)
2x=16
x=8
y=-1
Step-by-step explanation:
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