To solve the equation \( x - 17 = 11 \), you should add 17 to both sides. This will isolate \( x \) on the left side. Here’s how it works step by step:
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Starting with the equation:
\( x - 17 = 11 \) -
Add 17 to both sides:
\( x - 17 + 17 = 11 + 17 \) -
This simplifies to:
\( x = 28 \)
So, the correct action to take is to add 17 to both sides.