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Which conclusion is correct for the equations 5x − 3y = 11 and 10x − 6y = 22?

Answer and explanation

Correct answer: There are infinitely many solutions

Multiply the first equation, 5x − 3y = 11, by 2. The result is 10x − 6y = 22, exactly the second equation. Equivalently, the ratios of the corresponding coefficients and constants are all equal: 10/5 = (−6)/(−3) = 22/11 = 2. Thus the equations describe coincident lines. They share every point on that line, so infinitely many ordered pairs satisfy them; a unique solution is not possible.

Related tags

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

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