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If the pair of linear equations \(x+y=8\) and \(kx+2y=14\) passes through the point \((2,6)\), what is the value of \(k\)?

Answer and explanation

Correct answer: 1

The point \((2,6)\) satisfies the first equation because \(2+6=8\). Substituting \(x=2\) and \(y=6\) into the second equation gives \(2k+2(6)=14\), or \(2k+12=14\). Thus, \(2k=2\) and \(k=1\). Therefore, option A is correct. Exam tip: To test whether a point lies on a line, substitute its coordinates directly into the equation.

Related tags

Pair Of Linear EquationsGraphical MethodPoint On LineParameterGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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