To solve the equation \( x + 12 = 42 \), you would need to subtract 12 from both sides of the equation. Here's how it works:
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Start with the equation:
\( x + 12 = 42 \) -
Subtract 12 from both sides:
\( x + 12 - 12 = 42 - 12 \) -
This simplifies to:
\( x = 30 \)
So, the correct statement is:
Subtract 12 from both sides of the equal sign. x = 30.