Help please this is due tomorrow, and i still have a lot more to do, will give brainliest

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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.

286 divided by 457.6 what is the quotient?