Dan’s aquarium holds 6 quartz of water more than Steven’s aquarium. Dan’s aquarium holds 7 gallons. How much does Steve’s aquarium hold?

Steve’s aquarium holds 5.5 gallons

6 quartz converted to gal is 1.5 gallons
Since dan has 7 gallons and has 1.5 gallons more than Steve, you need to find the difference.
7-1.5=5.5

Ibelieve the second one, but if not, the first one will do. hope this : )