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Which statement is correct about the equations 2x + 3y = 11 and 4x + 6y = 21?

Answer and explanation

Correct answer: There is no solution

The governing concept is the consistency condition for a pair of linear equations. Multiplying the first equation by 2 gives 4x + 6y = 22, whereas the second equation is 4x + 6y = 21. The left-hand sides are identical, but the constants are different, so the same expression cannot equal both 22 and 21. Geometrically, the two equations represent distinct parallel lines, which never intersect. Therefore the pair is inconsistent and has no common ordered pair (x, y). Option C is correct. Option A would require different slopes, option B would require the equations to be proportional including their constants, and option D is impossible for a linear pair.

Related tags

Linear EquationsInconsistent PairNo SolutionClass 10Algebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equations In Two VariablesMathematics

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