To find the value of \(5c\), we first need to solve for \(c\) using the equation \(3c = 12\).
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Divide both sides of the equation by 3: \[ c = \frac{12}{3} = 4 \]
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Now, to find \(5c\), we multiply \(c\) by 5: \[ 5c = 5 \times 4 = 20 \]
Thus, the value of \(5c\) is \(20\).