Alright so i need a little refresher . could you explain to me how you solve a equation using y=mx+b form ? heres the problem . 2x+2y= 4

2x + 2y = 4
2x - 2x + 2y = 4 - 2y
2y = 4 - 2x
 2         2
  y = 2 - x
2x + 2(2 - x) = 4
2x + 4 - 2x = 4
2x - 2x + 4 = 4
0x + 4 = 4
       -4  -4
       0x = 0
        0     0
         x = 0
2(0) + 2y = 4
0 + 2y = 4
+0        +0
      2y = 4
       2     2
        y = 2
  (x, y) = (0, 2)
 (x, y) = (2, 0)