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What type of pair is (12x+18y=42) and (2x+3y=8)?

Answer and explanation

Correct answer: Inconsistent

For the two equations, \(a_1/a_2=12/2=6\) and \(b_1/b_2=18/3=6\), but \(c_1/c_2=42/8=21/4\). Thus, \(a_1/a_2=b_1/b_2\neq c_1/c_2\), so the two lines are distinct and parallel. Hence, the pair has no solution and is inconsistent. A coincident or dependent pair requires all three ratios to be equal. Exam tip: compare \(a_1/a_2\), \(b_1/b_2\), and \(c_1/c_2\) systematically.

Related tags

Pair Of Linear EquationsConditions For SolvabilityInconsistent PairParallel LinesClass 10 MathematicsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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