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Which statement is correct for the equations (12x+13y=55) and (24x+25y=107)?

Answer and explanation

Correct answer: 12/24 ≠ 13/25, so there is a unique solution

For two linear equations, the condition a₁/a₂ ≠ b₁/b₂ indicates a unique solution. Here, 12/24 = 1/2 and 13/25 = 0.52, so the two ratios are unequal. Solving the equations gives y = 3 and x = 4/3. Therefore, B is correct; A and C incorrectly assume equal ratios, while D reverses the values of x and y. Exam tip: Compare a₁/a₂ and b₁/b₂ first to determine the number of solutions.

Related tags

Pair Of Linear EquationsSolvability ConditionsUnique SolutionRatio TestClass 10 MathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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