Solve the system of equations. in this form: (x, y)

-5y + 8x = - 18

5y + 2x = 58

If we add the equations it looks like

-5y + 8x + 5y + 2x = - 18+58

so 10x=40

so x=40/10=4

now let's replace x by 4 in the second equation

5y + 2*4=58

5y=58-2*4=58-8=50

so y=50/5=10

so (x, y) = (2, 10)