[tex]x - (-x + y) - (2x + 2y) + 4x = x + x - y - 2x-2y + 4x = 4x-3y\\\\\\(2x+4)-3(x+y) = 2x+4 - 3x - 3y =4 -x-3y \\\\\\(5x-4y) - (x+y) + 2x(y-3) =5x-4y -x-y+2xy - 6x = -2x -5y + 2xy[/tex]
[tex]3(5x+4) = 15x + 12\\\\\\12y(17+4b - a) = -12ay + 48by + 204y[/tex]
