Ryan's gas tank is 1/6 full. After he buys 7 gallons of gas, it is 2/3 full. How many gallons can Ryan's tank hold?

Answer 1

X is the # of gallons that the tank can hold, max capacity!

(2/3 - 1/6) X = 7 <--- 7 gallons raised the amount from 1/6 to 2/3

(4/6 - 1/6)X = 7

3/6 X = 7

1/2 X = 7

X = 14

the tank hold 14 gallons

half is 7 gallons, so yes it checks