Question

(8x + 3y -18 ) - ( -10x -10y -18)

Answer 1

Answer: 18x+13y

Step-by-step explanation: (8x + 3y -18 ) - ( -10x -10y -18)

                                             8x + 3y -18 + 10x +10y +18

                                             8x + 10x + 3y + 10y -18 + 18

                                             18x + 13y

Answer 2

Answer: 8x +3y-18 -( -10x -10y -18)
So
When the bracket will open the sign will change
8x +3y-18+10x+10y+18
So
8x+10x =18x
+3y+10y=13y
-18+18 will be cut
Answer is 18x+13y