Well, I know 2+2=5, So I can probably help you out:)
Becky
2x-(x+6(x-3))+y
2x-(x+6(x)+6(-3))+y (got that)
2x-(x+6x-18)+y (the 18 - because you have a positive and neg?)
2x-(7x-18)+y (got that)
2x +(-1)(7x)+(-1)(-18)+y (why did it change to plus behind the 2x and it doesn't look like it affects the answer but where did the (-1)s come from?
2x-7x+18+y=-5+y+18 (why -5 instead of 5?)