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What is the correct conclusion by observing the equations (20x-15y=85) and (4x-3y=18)?

Answer and explanation

Correct answer: No solution

For the two equations, a₁/a₂ = 20/4 = 5 and b₁/b₂ = (-15)/(-3) = 5, but c₁/c₂ = 85/18, which is not 5. Thus, the two lines have equal slopes but different intercepts, so they are distinct parallel lines and never intersect. Therefore, the pair has no solution. Infinitely many solutions require all three ratios to be equal, while a unique solution requires the first two ratios to be unequal. Exam tip: If a₁/a₂ = b₁/b₂ ≠ c₁/c₂, the pair is inconsistent and has no solution.

Related tags

Linear EquationsSolvability ConditionsNo SolutionParallel LinesClass 10Conditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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