-3х - 2y =5.5
Х+ Зу = 7.5

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.