Question

A two digit number and the number with digits interchanged add up 143. In the given number the digit in unit's place is 3 more than digit in the ten's place. Find the original number.​

Answer 1

Let xy be the no.

y+x=143

y=3+x

3+x+x=143

2x+3=143

2x=143-3

2x=140

x=70

y=3+x

y=3+70

y=73

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