$256.75
Add $178 + $98.25= $276.25
Then $276.25 - $19.50 = $256.75
Do you mean an extraneous solution? I will tell you what I think. To tell if a solution is extraneous you need to go back to the original problem and check if there actually is a solution or if the solution is actually right. If not then it is extraneous.
