Final answer:
To find the x value of the solution, solve the system of equations by substituting and rearranging the given equations. The x value of the solution is 18.
Step-by-step explanation:
To find the x value of the solution, we need to solve the system of equations. First, we can solve equation a for x by rearranging it to x = 6 + 2y. Then, we substitute this value of x into equation b to get 6y = (6 + 2y) + 18. Simplifying this equation gives us 4y = 24, so y = 6. Finally, we substitute this value of y back into equation a to solve for x: x = 6 + 2(6) = 18. Therefore, the x value of the solution is 18.