Answer:
x=400-
+6y/2
Explanation:
The equation starts as: 2x+6y=400
Now we have to get x by itself:
2x+6y=400
-6y -6y
2x=400+6y
÷2 ÷2 ÷2
x=(400÷2)+(6y÷2)
x=200+3y
(Note: This problem is asking for the "unsimplified version" so the answer is 400+6y/2)