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Xiao Ming's family recently bought a house and is going to use wooden floors to lay the room in the decoration. ...

Solution: Let the salary per square meter of floor be X and the salary per square meter of floor tile be Y.

y-x=5

Three quarters (135-x) =110-y

The solution is x= 15.

y=20

135- 15= 120

1 10-20=90

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