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For two numbers the equations (4x+y=19) and (x-3y=2) are formed. What will be the solution status?

Answer and explanation

Correct answer: One unique solution

The determinant of the coefficients is \\(4(-3)-1(1)=-13\\ne0\\). Therefore, the two lines intersect at exactly one point, so the pair has one unique solution. Option B would apply only when the lines are parallel, with equal ratios of the corresponding coefficients. Exam tip: if \\(a_1b_2-a_2b_1\\ne0\\), a pair of linear equations has a unique solution.

Related tags

Linear EquationsSolution StatusUnique SolutionDeterminantConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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