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The sum of two numbers is (52). Three times the larger number plus twice the smaller number is (136). What is the larger number?

Answer and explanation

Correct answer: 32

Let the larger number be \(x\) and the smaller number be \(y\). Then \(x+y=52\) and \(3x+2y=136\). Multiplying the first equation by 2 gives \(2x+2y=104\). Subtracting this from the second equation gives \(x=32\). Therefore, the larger number is 32. For example, 30 does not satisfy the second condition. Exam tip: multiply one equation suitably to eliminate one variable quickly.

Related tags

Pair Of Linear EquationsElimination MethodWord ProblemsAlgebraClass 10Algebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equations In Two Variables

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