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What is the sum of these mixed numbers 2 1/8 + 4 3/8

Write a story that matches with the expression 42x-5 pls hurry

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.