Let's solve the equation step by step, filling in the missing terms and simplifying any fractions.
Starting with the original equation: \[ 17a + 3 = 20 \]
- Subtract 3 from both sides: \[ 17a = 20 - 3 \]
So: \[ 17a = 17 \]
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Now divide both sides by 17: \[ a = \frac{17}{17} \]
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Simplify the fraction: \[ a = 1 \]
Therefore, the completed process is:
- \( 17a = 20 - 3 \) (or \( 17a = 17 \))
- \( a = \frac{17}{17} \)
- \( a = 1 \)