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Can you decompose the numbers 20,740,6,000

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression