25 points!!!

A system of equations is shown.
2x + 2y = 24
X = 3y

What is the value of x + y?

Enter your response here: Only 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -, -, and / are allowed in your answer.
Answers that are mixed numbers must be entered as an improper fraction or a decimal.​