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What is the solution of \(\frac{x}{8}+\frac{y}{4}=5\) and \(\frac{x}{4}-\frac{y}{6}=2\)?

Answer and explanation

Correct answer: \(x=16,\ y=12\)

Multiplying the first equation by 8 gives \(x+2y=40\). Multiplying the second equation by 12 gives \(3x-2y=24\). Adding these equations gives \(4x=64\), so \(x=16\). Substituting this into \(x+2y=40\) gives \(16+2y=40\), hence \(y=12\). Therefore, the correct solution is \(x=16,\ y=12\). Option A does not satisfy the first equation on substitution. Exam tip: For linear equations containing fractions, first clear the denominators and then apply elimination.

Related tags

Linear EquationsPair Of Linear EquationsElimination MethodFractional EquationsClass 10 MathematicsAlgebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equations In

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