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If (cx+14y=56) and (15x+35y=121) have no solution, what will (c) be?

Answer and explanation

Correct answer: (6)

For two linear equations to have no solution, the ratios of the coefficients of the variables must be equal, while the ratio of the constant terms must be different. Thus, \(\frac{c}{15}=\frac{14}{35}=\frac{2}{5}\), giving \(c=6\). Also, \(\frac{56}{121}\neq\frac{2}{5}\), so the two lines are distinct and parallel. Hence, option (6) is correct. Exam tip: For no solution, use \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\neq\frac{c_1}{c_2}\).

Related tags

Linear EquationsSolvability ConditionsNo SolutionParallel LinesParameterConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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