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What is the correct conclusion by observing the equations (18x-12y=72) and (3x-2y=13)?

Answer and explanation

Correct answer: No solution

Comparing the corresponding coefficients gives 18/3 = 6 and (-12)/(-2) = 6, but 72/13 is not equal to 6. Thus, a₁/a₂ = b₁/b₂ ≠ c₁/c₂, so the pair is inconsistent and has no solution. Equivalently, multiplying the second equation by 6 gives 18x − 12y = 78, which contradicts the first equation, 18x − 12y = 72. Exam tip: When a₁/a₂ = b₁/b₂ but c₁/c₂ is different, the lines are parallel and distinct, so the number of solutions is zero.

Related tags

Pair Of Linear EquationsConditions For SolvabilityNo SolutionParallel LinesClass 10 MathematicsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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