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What is the relation among all three ratios in the equations (8x+12y=40) and (2x+3y=10)?

Answer and explanation

Correct answer: All three ratios are equal

Here, a₁/a₂ = 8/2 = 4, b₁/b₂ = 12/3 = 4, and c₁/c₂ = 40/10 = 4. Hence, a₁/a₂ = b₁/b₂ = c₁/c₂, so all three ratios are equal. This means that the two equations represent the same line and have infinitely many solutions. Option B is incorrect because the third ratio is not different; it is also equal to 4. Exam tip: when all three ratios are equal, the pair of linear equations represents coincident lines and has infinitely many solutions.

Related tags

Linear EquationsSolvability ConditionsRatio ComparisonCoincident LinesClass 10Conditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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