X + 5y - 10 = 0

x = 2y - 8

So since we know what x is, we can substitute it into the original equation for x like so to solve for y ...

(2y - 8) + 5y - 10 = 0

2y - 8 + 5y = 10

2y + 5y = 18

7y = 18

y = 18/7 (or about 2.57)

So now we know what x is, we can sub it into the below equation to solve for x ...

x = 2 (18/7) - 8

x = 36/14 - 8 (or about - 5.43)