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For two numbers, the equations (3x+y=14) and (x-2y=1) are formed. What will be the solution status?

Answer and explanation

Correct answer: One unique solution

In the two equations, \(a_1=3, b_1=1\) and \(a_2=1, b_2=-2\). Since \(\frac{a_1}{a_2}=\frac{3}{1}=3\) and \(\frac{b_1}{b_2}=\frac{1}{-2}=-\frac{1}{2}\) are unequal, the two lines intersect at exactly one point. Therefore, the pair has one unique solution. Option B would apply only when the lines are parallel, which requires \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\). Exam tip: retain the negative sign while comparing ratios of coefficients.

Related tags

Linear EquationsSolution ConditionsUnique SolutionCoefficient RatiosCoordinate GeometryConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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