im not sure if its 3w+7=19 or 3w-7=19 or if its * or / but you need to isolate w to get the answer so if its 3w-7=19 add 7 on both sides to get 3w=26 (the 7 gets canceled out on the other side and goes away) then you divide 26/3 and get 8 and 2/3 if its 3w+7=19 subtract 7 on both sides and the 7 gets canceled out and it becomes 3w=12 and divide by 3 both sides the 3 gets canceled out and its w=4 i think you meant to write this one the answer is much simpler good luck!