Choose the correct answer for the variable having unique solution

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The system of equations are

7 x + (m - 7) y + 8 = 0

and

3 x + (m + 6) y + 8 = 0

. Find the value of \(m\) if the system of equations has a unique solution.

The equations have a unique solution for all real numbers except \(m =\)

(Note: If the answer is a whole number, mention as it is. If not, round off the answer and submit it as a whole number.)

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5. Choose the correct answer for the variable having unique solution