18 - 2[x + (x-5)] First I would get rid of the inside parenthesis by distributing the + to everything inside and end up with;
18 - 2[x + x - 5] Then I'd combine like terms inside the brackets 18 - 2[2x - 5] Then I'd multiply what is inside the brackets by the -2 18 - 4x + 10 I'd combine like terms and end up with:
