1st. since we are adding whats in the ( ), ignore them. If we were multiplying or dividing it would not be that easy, but we arent. 2nd, add your like terms.... so (4-2x)+(3x-2) would become 4 - 2x + 3x - 2..... which by adding like terms we can simplify that by adding (-2x) + (3x) which gives us 1x or just x. then 4 - 2 is just 2... sooooo,.... x -2 is your answer.
Credit to: sma51664 for getting the right answer