(15 - 4y ) - ( 3x- y ) + (3x+1 ) = (3a -3b ) - ( 2a - 3b ) - (2a - 3b ) + ( -a + 4b ) = ( 8m - 3n - 5p ) - ( 6m - 5n + 7p ) =

(15 - 4y ) - ( 3x- y ) + (3x+1 ) = 15-4y-3x+y+3x+1=16-3y (3a -3b ) - ( 2a - 3b ) - (2a - 3b ) + ( -a + 4b ) =3a-3b-2a+3b-2a+3b-a+4b=-2a+7b ( 8m - 3n - 5p ) - ( 6m - 5n + 7p ) =8m-3n-5p-6m+5n-7p=2m+2n-12p

(15 - 4y ) - ( 3x- y ) + (3x+1 ) = 15 - 4y - 3x + y + 3x + 1=16 - 3y (3a -3b ) - ( 2a - 3b ) - (2a - 3b ) + ( -a + 4b ) =3a - 3b - 2a + 3b - 2a + 3b=-a ( 8m - 3n - 5p ) - ( 6m - 5n + 7p ) =8m - 3n - 5p - 6m + 5n - 7p = 2m + 1n - 12p