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Which statement is correct by observing (9x+2y=31) and (18x+4y=62)?

Answer and explanation

Correct answer: Lines are the same

The second equation is exactly twice the first: multiplying 9x+2y=31 by 2 gives 18x+4y=62. Hence, both equations represent the same line and the pair has infinitely many solutions. Exam tip: when the ratios of the corresponding coefficients and constant terms are all equal, the two lines are coincident.

Related tags

Linear EquationsSolvability ConditionsCoincident LinesInfinite SolutionsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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