Let’s use PEMDAS to solve this question. We have parenthesis that need to be solved, so distribute.
(6(x) - 6(3)) - (2(x) - 2(5))
6x - 18 - 2x + 10
Now combine like terms.
6x - 2x
-18 + 10
3x - 8
Since we cannot do any operations between a number with a variable and a number without. 3x - 8 is our final answer.