Answer:
z=2
x=0
y=0
Look below
Explanation:
Step 1: Combine like terms
2z+y-2z=-3 can be changed to y=-3 because 2z and -2z cancel out
Step 2: Set it up
x-y+2z=6
y =-3
-x-2y+3z=7
Step 3: Do the addition
x+(-x)=0
-y+y=0
2z+3z=5z
6+(-3)=3
3+7=10
Conclusion:
5z=10
Divide:
5z/5=z
10/5=2
z=2
x=0
y=0