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Which conclusion is correct by observing (6x+12y=18) and (x+2y=4)?

Answer and explanation

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

Compare the coefficients in standard form: \(a_1/a_2=6/1=6\), \(b_1/b_2=12/2=6\), but \(c_1/c_2=18/4=9/2\). Thus, \(a_1/a_2=b_1/b_2\ne c_1/c_2\), so the two lines are distinct and parallel, and the pair has no solution. Option A is incorrect because all three ratios are not equal. Exam tip: remember the no-solution condition as \(a_1/a_2=b_1/b_2\ne c_1/c_2\).

Related tags

Linear EquationsSolvability ConditionsParallel LinesNo SolutionConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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