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Describe all numbers $x$ that are at a distance of $1$ from the number $10.$ Express this using absolute value notation.

The answer field below uses the symbol mode option in Mobius. That lets you type in a vertical bar $/$ to represent absolute values. Also, when you type in $$ and then $=,$ the symbol mode will automatically convert that to $.$ In the same way, if you type in $>$ and then $=,$ the symbol mode will automatically convert that to $.$