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What type of pair is (10x+15y=25) and (2x+3y=8)?

Answer and explanation

Correct answer: Inconsistent

For the two equations, \(\frac{a_1}{a_2}=\frac{10}{2}=5\) and \(\frac{b_1}{b_2}=\frac{15}{3}=5\), but \(\frac{c_1}{c_2}=\frac{25}{8}\). Since \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\), the two lines are distinct and parallel. Hence, the pair is inconsistent and has no solution. Option B would be correct only if all three ratios were equal. Exam tip: Compare all three coefficient ratios in such questions.

Related tags

Linear EquationsSolvability ConditionsInconsistent PairParallel LinesClass 10 MathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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