(-6)•(-3)-(7):2

To solve the expression \((-6) \cdot (-3) - (7) : 2\), we will follow the order of operations (PEMDAS/BODMAS).

1. Multiplication: \[ (-6) \cdot (-3) = 18 \]

2. Division: \[ (7) : 2 = 3.5 \]

3. Subtraction: Now we subtract the result of the division from the result of the multiplication: \[ 18 - 3.5 = 14.5 \]

So, the final result is: \[ \boxed{14.5} \]