As a mixed number, it's 64 and 4/10:

As an improper fraction, it's 644/10:

This can also be reduced to 322/5:

Answer: 5y + x
Step-by-step explanation: As you first step to this problem, change all your minus signs to plus negatives.
To simplify, we can only combine what are called our like terms and in this problem, we have one y-term and we have a pair of like terms in our x-terms.
So let's start by combining our y-terms.
13y + -7y simplifies to 5y.
Now we have one x-term so we have 5y + x.
George completed more homework than Tina. Two thirds is equall to 66%