Identify the choice that best completes the statement or answers the questions.

For questions 1–3, what is the solution of the system? Use substitution.

y = x + 6
y = 2x

The solution of the system is:

x + 6 = 2x

Solving for x:
x = 6

Plugging the value of x back into one of the equations to find y:
y = 6 + 6
y = 12

Therefore, the solution to the system is x = 6 and y = 12.