(-5) +(1/3 x2/3 wuts the answer

Don't know how to find x given these segment lengths

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.

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?