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At which point do the lines 2x + y = 13 and x + y = 9 intersect?

Answer and explanation

Correct answer: (4, 5)

Subtracting the second equation from the first gives x = 4. Substituting this in x + y = 9 gives 4 + y = 9, so y = 5. Therefore, the point of intersection is (4, 5). The distractor (3, 6) satisfies the second equation, but 2x + y = 12, not 13. In an exam, verify the ordered pair in both equations.

Related tags

Intersection PointGraphical MethodLinear EquationsGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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