The unit digit of a two digit number is 3 and seven times the sun of the digit is the number itself . find the number
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let number be 10x+y
where y is the unit digit
y=3(given)
A/Q
7(x+y) = 10x + y
=> 7x + 21 = 10x + 3
=> 3x = 21- 3
=> 3x = 18
=> x = 6
thus number is
10× 6+ 3
= 63 answer
where y is the unit digit
y=3(given)
A/Q
7(x+y) = 10x + y
=> 7x + 21 = 10x + 3
=> 3x = 21- 3
=> 3x = 18
=> x = 6
thus number is
10× 6+ 3
= 63 answer
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