The answer is: x = 400
Here's how I got my answer:
Step 1: Subtract .60 from both sides. Leave us with 

Step 2: Simplify 
 to
 to 
 . Which leaves us with
. Which leaves us with 

Step 3: Subtract 20 from both sides. Which leaves us with 

Step 4: Simplify 
 to 80. Which leaves us with
 to 80. Which leaves us with 

Step 5: Divide both sides by 0.2. Which leaves us with 

Step 6: Simplify 
 to 400. Which leaves us with our answer, x = 400
 to 400. Which leaves us with our answer, x = 400