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What will be shown in the graph of (9x+6y=15) and (3x+2y=5)?

Answer and explanation

Correct answer: Same line

Dividing every term of \(9x+6y=15\) by 3 gives \(3x+2y=5\). Hence, both equations represent the same line and have infinitely many common solutions. Option B is incorrect because distinct parallel lines require the coefficients of \(x\) and \(y\) to be proportional but the constants not to be proportional. Exam tip: if \(a_1/a_2=b_1/b_2=c_1/c_2\), the two lines are coincident, or the same line.

Related tags

Linear EquationsGraphical SolutionSolvability ConditionsCoincident LinesInfinite SolutionsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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