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What is the point of intersection of the graphs of \(x+2y=12\) and \(x+y=8\)? This point represents the graphical solution of the equations.

Answer and explanation

Correct answer: \((4,4)\)

Subtracting the second equation from the first gives \(y=4\). Substituting this into \(x+y=8\) gives \(x=4\), so the graphs intersect at \((4,4)\). Options B and D satisfy the second equation but not the first. Exam tip: Verify a graphical solution by substituting both coordinates into both equations.

Related tags

Graphical SolutionIntersection PointLinear EquationsGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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