SOLUTION: a no consists of two digits of which ten's digit exceeds the unit digit by 7.the no itself is equal to 10 times the sum of its digits .find the no?
Question 364966: a no consists of two digits of which ten's digit exceeds the unit digit by 7.the no itself is equal to 10 times the sum of its digits .find the no? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! a no consists of two digits of which ten's digit exceeds the unit digit by 7.the no itself is equal to 10 times the sum of its digits .find the no?
let tens digit be x
& units digit be y
x-y=7......................1
10x+y=10(x+y)
10x+y=10x+10y
9y=0
y=0
plug value of y in equation 1
x-y=7
x=7
the number is 70
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m.ananth@hotmail.ca
