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What is the value of (p) for the equations (px+9y=45) and (20x+30y=103) to have no solution?

Answer and explanation

Correct answer: 6

For two linear equations to have no solution, the condition is \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\). Here, \(\frac{p}{20}=\frac{9}{30}=\frac{3}{10}\), so \(p=6\). Also, \(\frac{45}{103}\ne\frac{3}{10}\), confirming that the lines are distinct and parallel. Exam tip: first equate the ratios of the coefficients of x and y, then verify that the ratio of constants is different.

Related tags

Linear EquationsNo SolutionSolvability ConditionsParameterParallel LinesConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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