Answer:
(7, -2)
Explanation:
To find the solution to the system using substitution, we put in the value of x from x = 5 - y into 2x + 5y = 4. This gives

Simplifying the above gives


Subtracting 10 from both sides gives


dividing both sides by 3 gives

With the value of y in hand, we now use it in x = 5 -y to find the value of x.
Substituting the y = -2 into x = 5 - y gives


Hence, the solution to our system is
