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How to solve the equation of Ma Xiaotiao's New Year gift in the sixth grade of mathematics?
Solution: If the shoes are X yuan, the coat is (140+x) yuan, and the hat is (x+ 140+x-2 10) yuan.

x+x+ 140+x+ 140+x-2 10 = 270

4x+280-2 10=270

4x+280=270+2 10

4x+280=480

4x=480-280

4x=200

x=50

Coat: 50+ 140= 190

Hat: 50+ 190-2 10=30