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Which conclusion is correct by observing (3x+6y=12) and (x+2y=5)?

Answer and explanation

Correct answer: First two ratios are equal but the constant ratio is different

In standard form, the coefficients are \(a_1=3,b_1=6,c_1=12\) and \(a_2=1,b_2=2,c_2=5\). Thus, \(\frac{a_1}{a_2}=3\) and \(\frac{b_1}{b_2}=3\), but \(\frac{c_1}{c_2}=\frac{12}{5}\). Therefore, the first two ratios are equal while the third is different. The lines are distinct and parallel, so the pair has no solution. Exam tip: If \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\), the pair is inconsistent.

Related tags

Linear EquationsConditions For SolvabilityInconsistent PairParallel LinesNo SolutionPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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