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Systems of inequalities word problems

A plane requires 33003300 gallons of fuel and 7575 minutes to make a round trip to Prague, and it takes 57005700 gallons of fuel and 130130 minutes to make a round trip to Stockholm.
A pilot is asked to use at least 9450094500 gallons of fuel and spend at least 24002400 minutes to make round trips to Prague and Stockholm in his plane.
Let PP denote the number of round trips to Prague and SS the number of round trips to Stockholm.
Write an inequality that represents the condition based on the number of gallons of fuel.
Write an inequality that represents the condition based on the number of minutes.