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What will (b) be for (bx+8y=32) and (12x+24y=71) to have no solution?

Answer and explanation

Correct answer: 4

Two linear equations have no solution when \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\). Here, \(\frac{b}{12}=\frac{8}{24}=\frac{1}{3}\), which gives \(b=4\). Also, \(\frac{32}{71}\ne\frac{1}{3}\), so the two lines are parallel and have no common solution. Exam tip: for no solution, the ratios of the coefficients must be equal, but the ratio of the constants must be different.

Related tags

Linear EquationsNo SolutionConditions For SolvabilityPair Of Linear EquationsParallel LinesPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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