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What is the solution of \(2x+3y=25\) and \(5x-3y=10\)?

Answer and explanation

Correct answer: \((x,y)=(5,5)\)

Adding the two equations cancels \(3y\) and \(-3y\): \(7x=35\), so \(x=5\). Substituting this into \(2x+3y=25\) gives \(10+3y=25\), hence \(y=5\). Therefore, the solution is \((x,y)=(5,5)\). Option B satisfies the first equation, but in the second equation it gives \(5x-3y=3\), not \(10\). Exam tip: add equations directly when one variable has opposite coefficients.

Related tags

Pair Of Linear EquationsElimination MethodSimultaneous EquationsSolution Of EquationsClass 10 MathematicsAlgebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equati

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