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What is the solution of (2x+3y=19) and (x-y=2)?

Answer and explanation

Correct answer: \((5,3)\)

From the second equation, \(x-y=2\), so \(x=y+2\). Substituting this into \(2x+3y=19\) gives \(2(y+2)+3y=19\), or \(5y=15\). Hence, \(y=3\), and then \(x=3+2=5\). Therefore, the solution is \((5,3)\). For example, \((6,2)\) gives \(x-y=4\), so it is not correct. Exam tip: verify the ordered pair in both original equations.

Related tags

Pair Of Linear EquationsSubstitution MethodLinear Equations In Two VariablesClass 10 MathematicsOrdered PairAlgebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equ

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