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How many solutions will (2x+7y=6) and (5x+9y=13) have?

Answer and explanation

Correct answer: One unique solution

The ratios of the coefficients of x and y are 2/5 and 7/9, respectively. Since 2/5 ≠ 7/9, the two lines intersect at exactly one point, giving one unique solution. Therefore, option A is correct. Exam tip: For a pair of linear equations, if a₁/a₂ ≠ b₁/b₂, the pair has a unique solution; hence it has neither no solution nor infinitely many solutions.

Related tags

Linear EquationsUnique SolutionRatio ConditionSolvabilityConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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