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What is the point of intersection of the lines \(x+y=12\) and \(x-y=4\)?

Answer and explanation

Correct answer: (8, 4)

Adding the two equations gives \(2x=16\), so \(x=8\). Substituting this into \(x+y=12\) gives \(y=4\). Therefore, the point of intersection is \((8,4)\). In option B, \(x-y=4-8=-4\), so it does not satisfy the second equation. Exam tip: Verify a common point by substituting its coordinates into both equations.

Related tags

Graphical MethodPoint Of IntersectionLinear EquationsGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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