To solve the equation \( 6x + 2 = 21 \), follow these steps:
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Subtract 2 from both sides:
\[ 6x + 2 - 2 = 21 - 2 \]
This simplifies to:
\[ 6x = 19 \]
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Now, divide both sides by 6:
\[ x = \frac{19}{6} \]
So, the solution is:
\[ x = \frac{19}{6} \approx 3.17 \]