Katy made muffins on 3 days. Each day she used of a stick of butter to make the muffins. Which can be used to find the total amount of butter Katy used on all 3 days?

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

c.

step-by-step explanation: