Hi

Not sure about your question, but one possibility is:

4x= -5y+10

-> x = (-5y+10)/4

use this for your second equation 5x= -y-19

5*[(-5y+10)/4] = -y - 19

(-25y+50)/4 = -y - 19

-25y+50 = -4y - 76

-21y = -126

=> y = (-126)/(-21) = 6

Now you now y, can you find x?

You need to solve 4x= -5*(6)+10 OR 5x= -(6)-19

Remember, (6) is the solution for y. I just wrote 6 instead of y.

Regards

Rapha