Math, asked by anita2370, 1 year ago

the unit digit of a two -digit number is 3 and seven time the sum of the digt is the number itsef.Find the number

Answers

Answered by rishabhg23

Let tens digit be x
. and unit digit be y

therefore the number is

Tens Unit
. X. Y
= 10x+y
and we have y = 3

Case I
7(x+y) = 10x+y
7(x+3) = 10x +3
7x + 21 = 10x + 3
3x = 18
x = 6

Therefore the number is 63

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