Answer:
(-2.2,-3)
Explanation:
We have been given a system of equations and we are asked to find the best approximation for the solution to this system of equations.


We will use substitution method to solve for the system of equations.
Upon substituting equation (1) in equation (2) we will get,

Upon adding 0.8 to both sides of our equation we will get,


Therefore, the best approximate value of x is -2.2 and approximate value of y is -3.