HELP PLEASEE ! ILL MEDAL !

The No-Crash Rental Company says the total cost to rent a dump truck can be found using the equation y = 45x + 75, where x represents the number of days that the truck is rented.

How many days could I rent the truck for a total of $480?

Question

HELP PLEASEE ! ILL MEDAL ! 

The No-Crash Rental Company says the total cost to rent a dump truck can be found using the equation y = 45x + 75, where x represents the number of days that the truck is rented.

 How many days could I rent the truck for a total of $480?

anonymous · Answer

i think what you have to do is the inverse of adding

anonymous · Answer

so subtraction ?

anonymous · Answer

yeah i think you have to 45 times a number and then add 75 to get the 480

anonymous · Answer

I did  45x * 9 + 75 = 480 .. thats how I got 480 .. am I right ? @TheOnlyDarkKnight

anonymous · Answer

add backwords

anonymous · Answer

if I add backwords that 120 @starwars22

anonymous · Answer

?

anonymous · Answer

right