Answer:
the answer is A
Step-by-step explanation:
Answer:
5x + 10y + -10y = 300 + -10y
Step-by-step explanation:
Here is your equation:

You have to divide 40 by a number to get 5. Switch it around, and divide 40 by 5. Since 40 divided by x is equal to 5, then 40 divided by 5 is equal to x.

That means x is equal to 8
Ok it is so easy it is 489467000