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For two numbers, the equations (7x+5y=58) and (4x-3y=11) are formed. What will be the solution status?

Answer and explanation

Correct answer: One unique solution

For the coefficients, \\(\frac{7}{4} \ne \frac{5}{-3}\\). Equivalently, the determinant of the coefficient matrix is \\(7(-3)-5(4)=-41\\), which is non-zero. Therefore, the two lines intersect at exactly one point, so the pair has one unique solution. In fact, \\(x=\frac{229}{41}, y=\frac{155}{41}\\). Exam tip: If \\(\frac{a_1}{a_2} \ne \frac{b_1}{b_2}\\), a pair of linear equations has a unique solution.

Related tags

Linear EquationsSolvability ConditionsUnique SolutionDeterminantMathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesClass 10 Mcq

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