Answer:
assuming that is the complete question, you add 5 + 256725262 and get 256725267. Leave the 3x alone because the other numbers do not have a variable. Therefore your expression is 3x + 256725267.
Unless this is an equation and you need to find x, then equal it to 0 and move 256725267 to the right side. you would get 3x = 256725267. Dividing by 3 on both sides, you get x = 85575089.