A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the
number, its digits are reversed. Find the number.
The sum of the digits of a two-digit number is 15. The number obtained by interchanging its
digits exceeds the given number by 9. Find the original number.
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Step-by-step explanation:
unknown number = xy
x+y× 4 + 3 =xy
4x+y +3 = xy
18 + xy = yx
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