Question

Abdul's gas tank is 1/5 full. After he buys 7 gallons of gas, it is 7/10 full. How many gallons can Abdul's tank hold?

Answer 1

Answer: 14 gallons

Explanation:

Let's call the total gallons Abdul's tank can hold x.

Then, based on the information given in the problem, you can write the following expression:

`(1)/(5)x+7=(7)/(10)x`

Therefore, when you solve for x, you obtain the following result:

`(1)/(5)x+7=(7)/(10)x\\\\(1)/(5)x-(7)/(10)x=-7\\\\-(1)/(2)x=-7\\\\-x=(-7)(2)\\x=14`