Answer:
z=-2
Explanation:
We must cancel out the one by subtracting it by 7 which gives
= -3z=6
Now we divide by 3 which gives
=-z=2
Now it is minus. To get it positive we must make the 3 negative
-2
-3z+1=7
-3z= 7-1
-3z=6 /: (-3)
z= -2
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