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Which statement is correct about (3x + 5y = 20) and (6x + 10y = 43)?

Answer and explanation

Correct answer: There is no solution

For a pair of linear equations, if the coefficients of x and y are proportional but the constants are not proportional in the same way, the two lines are parallel and distinct. Multiplying the first equation by 2 gives 6x + 10y = 40. The second equation is 6x + 10y = 43, which has exactly the same left-hand side but a different right-hand side. A pair of numbers cannot make the same expression equal to both 40 and 43. Therefore the equations are inconsistent and have no common solution, so option C is correct. They do not have one or infinitely many solutions; those cases require non-proportional coefficients or complete proportionality, respectively.

Related tags

Linear EquationsConditions For SolvabilityNo 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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