Question

the unit digit of a two digit number is 3 and 7 times the sum of the digit is the number itself . Find the number .
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Answer 1

Answer:

Number =63

Step-by-step explanation:

Number =y×10+x

Given x=3

7(x+y)=10y+x...(1)

7(3+y)=10y+3

21+7y=10y+3

−3y=−18

y=6

Number =63