Question

7 upon 12 + 13 upon 18 find the sum fraction
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Answer 1

Let the numerator be x and the denominator be y.

From the given information, we have,

x+y=18and

y+2

x

=

3

1

or,x+y=18

=>y=18−x....(i)

Also,

y+2

x

=

3

1

=>3x=y+2

=>3x−y−2=0....(ii)

Solving by substitution method,

Substituting (i) in (ii), we get,

3x−y−2=0

=>3x−18+x−2=0

=>4x=20

=>x=5

Putting x=5 in equation (i), we get,

y=18−x

=>y=18−5

=>y=13

Thus, the original fractyion is

y

x

=

13

5