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What is the most suitable conclusion by observing (5x+3y=17) and (15x+9y=51)?

Answer and explanation

Correct answer: There are infinitely many solutions

Every term in the second equation is three times the corresponding term in the first: 15x+9y=3(5x+3y) and 51=3×17. Thus, both equations represent the same line; they are dependent and consistent, so they have infinitely many solutions. No solution or distinct parallel lines would result if the coefficients had the same ratio but the constant terms had a different ratio. Exam tip: if \(a_1/a_2=b_1/b_2=c_1/c_2\), the pair has infinitely many solutions.

Related tags

Pair Of Linear EquationsConditions For SolvabilityDependent EquationsInfinite SolutionsCoincident LinesPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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