1.)Solve each system by any method.

x- 2y+ 2z= 1

4x+ 6y- 4z= -10

-2x- 5y+ 8z= 37

2.) In a bag contains 515 coins worth $102.10. There were three types of coins:nickels, dimes and quarters. If the bag contained the four times as many quarters as nickels, how many of each type of coin was in the bag?

Please show all the work for arriving at these solutions. Thank you!