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Which is the graphical solution of (2x + y = 11) and (x + y = 8)?

Answer and explanation

Correct answer: (3, 5)

The graphical solution of two linear equations is their common point, or the point where the two corresponding lines intersect. We can verify each candidate by substitution. For (3, 5), the first equation gives 2(3) + 5 = 6 + 5 = 11, and the second gives 3 + 5 = 8. Therefore (3, 5) lies on both lines and is their intersection point. Option B is correct. For (5, 3), the first equation gives 13; for (4, 4), it gives 12; and for (2, 6), it gives 10, so those points fail the first equation even though some may satisfy the second. Since a graphical solution must satisfy both equations simultaneously, only option B is valid.

Related tags

Graphical-SolutionIntersectionLinear-EquationsGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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