Hey, I'm new on this forum.

Just started a college math course this semester and I realized I was VERY rusty since I havent done math in the last 4 years.

Working on what should be ''easy'' problems before the real thing starts and I seem to be stuck on that. If any of you could help me out with a step by step simplification.

4+3(5x-(x-3)

I'm probably only missing a small thing and can't get the the correct answer which should be 12x-5.

Thanks in advance!