7•*=1

I’m not sure how to read "7•*=1" without more context. Here are two common interpretations:

• If • stands for multiplication and * is a missing number (so 7 × (something) = 1), then the missing number must be 1/7.

  • So * = 1/7.

• If you’re asking to solve 7 ÷ x = 1, then x = 7 (using the ÷ interpretation for • and treating * as the missing divisor).

If you meant something else (different operators, or two operators between 7 and 1, etc.), please clarify the meaning of • and *. I can tailor the answer once I know how you want to interpret the symbols.