What equation would you use to solve this problem?

Beyonce’s fish tank holds 150 gallons of water and is leaking at a rate of 5 gallons per day.
Jay Z’s fish tank holds 130 gallons of water and is leaking at a rate of 3 gallons per day. At how many days will the two fish tanks have the same amount of water in them?

a. 150 - 5x = 130 - 3x
b. 5x - 150 = 3x - 130
c. 130 + 3x = 150 - 5x

a. 150 - 5x = 130 - 3x