Answer:
x = 3
y = 7
Step-by-step explanation:
First, we need to take the first equation and solve for y as follows:

Then, we can replace y with (2.5 + 1.5x) on the second equation, so:

So, solving for x, we get:

Therefore, the value of x is 3.
Finally, we can calculate the value of y as follows:

So, the solution of the system is x = 3 and y = 7