Solve the following system of equations.

9x - 5y = 11

5x + 4y = - 21

9x-5y=11

Move all terms containing x to the left, all other terms to the right.

now add 5y to each side and now it should look like this:

9x + - 5y + 5y = 11 + 5y

Now divide each side by 9 and the answer is ...

Simplifying x = 1.222222222 + 0.5555555556y