Solve the system with three variables with elimination or substitution x+y+z=1

3y-z=8

x-y+z=-3

Help is appreciated. Please don't spam "I dunno" or "?" to get the points. I need a valid answer, to check my work.

Thank you

x=1, y=2, z = -2

Step-by-step explanation:

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

answer:   2 multiplied by x =24

step-by-step explanation: