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Choose the correct statement for the equations 15x + 9y = 6 and 5x + 3y = 2.

Answer and explanation

Correct answer: There are infinitely many solutions

Compare the coefficients and constants in the two equations. Multiplying 5x + 3y = 2 by 3 gives 15x + 9y = 6, which is exactly the first equation. Thus the two equations are dependent and represent one coincident line rather than two different lines. Every point on this common line is a solution of the pair, so infinitely many solutions exist. A unique solution would require intersecting lines, and distinct parallel lines would have no common point.

Related tags

Linear EquationsCoincident LinesInfinite SolutionsSolvabilityConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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