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What do you get when you simplify (9y-4y)?

Answer and explanation

Correct answer: 5y

\(9y\) and \(4y\) are like terms because both contain \(y\) to the first power. Subtract their coefficients: \(9y-4y=(9-4)y=5y\). \(13y\) would result from adding the coefficients, whereas the expression involves subtraction. \(5\) incorrectly leaves out the variable \(y\). Exam tip: when adding or subtracting like terms, retain the variable and its exponent.

Related tags

AlgebraLike TermsSimplifying ExpressionsSubtracting CoefficientsGrade 9 MathematicsCommon QuestionsCommonMathematics

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