Final answer:
To solve this expression, multiply 5 and 18, then subtract the result from 3. The solution is -87.
Step-by-step explanation:
To solve the expression 3−5×18:
- Multiply 5 and 18: 5 × 18 = 90
- Subtract the result from 3: 3 - 90 = -87
Therefore, the solution is -87.