What is the x intercept for 6x - 7y = 42

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

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Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.