Math

Mike and John split the cost of a $270 car trip. Mike pays $20 more than John. How much did John pay?
I solved it as 20x+x=270
I'm not sure if it's correct, can I please get an explanation

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  1. Why did you multiply 20 times x?

    x + x + 20 = 270

    2x = 250

    x = 125

    Mike paid $125.

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