<human>:  Mike and John dined at the Taco Palace restaurant. They each ordered the Taco Grande Plate as their main meal, but Mike also ordered a side salad for $2, a plate of cheesy fries for $4, and a diet cola for $2. As a result, Mike's lunch bill was twice as large as John's bill. What was the combined total cost, in dollars, of Mike and John's lunch?
<bot>: Define a variable ** Let "x" be the cost in dollars of the Taco Grande Plate.
Write an equation ** Since twice the cost of John's Taco Plate equals the cost of Mike's Taco Plate plus added items, then 2x = x+2+4+2.
Simplify ** Simplifying the equation, we get 2x = x+8.
Simplify ** Subtracting x from each side of the equation, we are left with x=8 dollars as the cost of the Taco Grande Plate.
Write an equation ** Thus the combined total cost of Mike and John's lunch is 8+8+2+4+2=<<8+8+2+4+2=24>>24 dollars.
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