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At which point do the lines \(2x+y=11\) and \(x+y=8\) intersect on the graph?

Answer and explanation

Correct answer: \((3,5)\)

Subtracting the second equation from the first gives \(x=3\). Substituting this into \(x+y=8\) gives \(y=5\). Therefore, the intersection point is \((3,5)\). Check: \(2(3)+5=11\) and \(3+5=8\). In the graphical method, the common point of the two lines represents the solution of the pair. Exam tip: verify both coordinates in both equations.

Related tags

Intersection PointGraphical MethodLinear EquationsSimultaneous EquationsGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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