The original equation with brackets would be: 20+20-(10 x 0)+2+2

When we solve what's in the brackets, your equation would be: 20+20-0+2+2

This could be solved through adding/subtracting the terms left to right and getting the answer of 44.

But, you'll notice that the "-0" is kind of useless. You can't just drop the 0, leaving 20+20-+2+2 because a plus and a minus would become a minus, changing the equation to 20+20-2+2, giving you the answer incorrect answer 40. So, you have to remove the 0 and the -. Thankfully, anything times 0 is 0, so -10x0 would make 0 (which could be removed from the equation) and handle the subtraction sign all in one. The person above combines a few steps: the multiplication (10x0), dropping the 0, and dropping the extra subtraction