Solve the system of equations by elimination.
-3x-y-3z= -8
3x+2y+2z= 10
-x-3y+z= -12

-3x-y-3z=-8

Step-by-step explanation: I hope this is right

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk