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What is the simplified form of \\(10r-3r\\)?

Answer and explanation

Correct answer: \\(7r\\)

Here, \(10r\) and \(3r\) are like terms because both contain the variable \(r\) to the same power. Subtract their coefficients: \(10-3=7\), so \(10r-3r=7r\). Option A incorrectly adds the coefficients, while option C changes the power of \(r\) to \(2\). Exam tip: when combining like terms, add or subtract only their coefficients and keep the variable part unchanged.

Related tags

AlgebraLike TermsSimplificationGeneral Chapter PracticeCommon QuestionsCommonMathematicsClass 9 Mcq

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