Explanation:
The second equation is the definition of 'y'....SUBSTITUTE this value of 'y' into the first equation...then solve for the 'x' coordiante :
.3x - (2 + .25x) =0
.3x - 2 - .25x = 0
.05x = 2
x = 40
Use this value of 'x' in one of the equations to find the 'y' coordinate
y = 2 + .25x
y = 2 + .25 (40)
y = 12