These equations are in standard form.
You can graph these equations to find the solution.
Standard form: Ax+By= C
Graph the equations.
I got (-4.2, -4.6) as the solution. x= -4.2 and y= -4.6
Now, plug those in and see if they equal each other.
2(-4.2)-4(-4.6)= 10
-8.4+18.4= 10
10=10
We know that this works.
I hope this helps!
~kaikers