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Question

Find value of x in the given pair of equations.

1x+a=3

1x−a=1


A

14

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B

12

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C

2

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D

4

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Solution

The correct option is B

12


The two equations are

1x+a=3
1xa=1

Now if we add both the equations, we get

1xa+1x+a=1+3

2x=4

x=12


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