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What is the correct solution status for the equations (19x+8y=67) and (9x+4y=32)?

Answer and explanation

Correct answer: One unique solution

The coefficient ratios are unequal: \(\frac{19}{9} \ne \frac{8}{4}\). Equivalently, the determinant is \(19 \times 4 - 8 \times 9 = 4 \ne 0\). Therefore, the two lines intersect at exactly one point, so the equations have one unique solution. Option B would apply if both equations represented the same line, while option A describes parallel lines. Exam tip: when \(\frac{a_1}{a_2} \ne \frac{b_1}{b_2}\), a pair of linear equations has a unique solution.

Related tags

Pair Of Linear EquationsConditions For SolvabilityUnique SolutionCoefficient RatiosDeterminantPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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