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Which statement is correct about 2x+3y=12 and 4x+6y=25?

Answer and explanation

Correct answer: There is no solution

The governing concept is the consistency condition for a pair of linear equations. Multiply the first equation, 2x+3y=12, by 2. It becomes 4x+6y=24. The second equation has exactly the same left-hand side but equals 25, so the pair would require the same expression to be both 24 and 25, which is impossible. Geometrically, the equations represent distinct parallel lines: their coefficients are proportional, but their constants are not in the same proportion. Hence there is no common ordered pair (x,y), and option A is correct. Infinite solutions would require the second equation to be 4x+6y=24, while one or two solutions do not apply to this inconsistent pair.

Related tags

Pair Of Linear EquationsConsistencyNo 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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