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If (y=24+5x), which value of (x) makes (y) equal to (9x)?

Answer and explanation

Correct answer: \(x=6\)

Given \(y=24+5x\) and the condition \(y=9x\), we get \(24+5x=9x\). Subtracting \(5x\) from both sides gives \(24=4x\), so \(x=6\). Hence, option C is correct. For instance, if \(x=5\), then \(y=49\) but \(9x=45\), so option B is not correct. Exam tip: when one variable has two given expressions, equate them and solve for the required variable.

Related tags

Linear EquationsPolynomialsSolve For XAlgebraic SubstitutionGrade 9 MathematicsLinear Growth And DecayIntroduction To PolynomialsMathematics

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