To find the solution, we can substitute the value of y from the first equation into the second equation:

6x + 4x = 15
10x = 15
x = 15/10
x = 1.5

Now that we have the value of x, we can substitute it back into the first equation to find the value of y:

y = 6(1.5)
y = 9

Therefore, the solution to the system of equations is x = 1.5 and y = 9.