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Representing Linear Equations for a Word Problem

The sum of th...

Question

The sum of the digits of a two-digit number is 9. If 27 is added to it, the digits of the number get reversed. The number is

A

27

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B

72

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C

63

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D

36

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Solution

The correct option is D
36

X+y=9

10x+y+27=x+10y

Then

X+y=9

9x-9y=-27

Solving this will get x=3 and y=6

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Representing Linear Equations for a Word Problem

Standard X Mathematics

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