Separate
y =- 2xy
-2xy = x - 8
Now solve first equation
and then second equation
PART2
y = -2x
y= -4x + 10
Is solved by , substracting both equations
Then
(y - y) = -2x - ( -4x + 10)
0 = -2x + 4x - 10
10 = 2x
10/2= xx
