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Simultaneous Linear Equations Help

If (5,k) is a solution of the equation 2x+y-7=0, find the value of k.

There is no k in the equation. I am not understanding where k came from. Please help me understand.

Simultaneous Linear Equations Help

If (5,k) is a solution of the equation 2x+y-7=0, find the value of k.

There is no k in the equation. I am not understanding where k came from. Please help me understand.

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Simultaneous Linear Equations Help

If (5,k) is a solution of the equation 2x+y-7=0, find the value of k.

There is no k in the equation. I am not understanding where k came from. Please help me understand.