How do you solve 4 (x-3?

I'm guessing that you meant to type 4 (x - 3). If that's the case, then you can solve this using the Distributive Property.

4 (x - 3) Multiply the number on the outside of the parentheses by both of the numbers on the inside.

(4 · x) - (4 · 3)

(4x) - (12) Now, simplify by taking out the parentheses.

4x - 12

4 (x-3)

4 (x) + 4 (3)

= 4x + 12