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In a problem, the equations formed are x + y = 13 and 2x + 3y = 34. What is the solution?

Answer and explanation

Correct answer: (5, 8)

These are simultaneous linear equations, and substitution gives a systematic solution. From x + y = 13, isolate x as x = 13 − y. Substitute this into 2x + 3y = 34: 2(13 − y) + 3y = 34. Expanding and combining like terms gives 26 − 2y + 3y = 34, so y = 8. Now substitute y = 8 into x + y = 13: x + 8 = 13, hence x = 5. Therefore the solution is (x, y) = (5, 8), making option A correct. Verification gives 5 + 8 = 13 and 2(5) + 3(8) = 10 + 24 = 34. Option B reverses the coordinates, and C and D fail the equations.

Related tags

Linear EquationsSubstitution MethodOrdered PairAlgebraic SolutionAlgebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equations In Two VariablesMathematics

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