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If \(\frac{x+y}{4}=6\) and \(\frac{x-y}{5}=2\), what are the values of \(x\) and \(y\)?

Answer and explanation

Correct answer: \(x=17,\ y=7\)

Simplifying the given equations gives \(x+y=24\) and \(x-y=10\). Adding these equations gives \(2x=34\), so \(x=17\). Substituting \(x=17\) into \(x+y=24\) gives \(y=7\). Therefore, \(x=17,\ y=7\) is correct. In option B, \(x+y=24\) is satisfied, but \(x-y=8\), not 10. Exam tip: For linear equations containing fractions, first multiply by the denominators to obtain simpler equations.

Related tags

Linear EquationsElimination MethodSubstitution MethodAlgebraClass 10Pair Of Linear EquationsAlgebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination Method

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