Find the value of $x$ if .

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answer is A.

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Detailed Solution

Concept- Solve the two linear equations given in theQuestion using the substitution method. Find the value of x by y from the first equation and substitute it into the second equation. This is a complete y equation. Solve the y value, reset the y value and get the x value.

Now putting the value of

in equation (1),

So,

Hence, option 1 is correct.

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