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Which relation is correct for the equations (18x+27y=126) and (2x+3y=16)?

Answer and explanation

Correct answer: (18/2=27/3 \ne 126/16)

Here, \(a_1=18, b_1=27, c_1=126\) and \(a_2=2, b_2=3, c_2=16\). Thus, \(a_1/a_2=18/2=9\) and \(b_1/b_2=27/3=9\), whereas \(c_1/c_2=126/16=63/8\), which is not 9. Therefore, \(a_1/a_2=b_1/b_2\ne c_1/c_2\), so the pair of linear equations is inconsistent and has no solution. Exam tip: equal ratios of the coefficients but an unequal ratio of the constant terms indicate no solution.

Related tags

Linear EquationsSolvability ConditionsRatio ComparisonNo SolutionConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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