Respuesta:
-3z-1=20
-3z=20+1
-3Z=21
-z=21/3
-z=7
z=7/1
z=7
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Verified answer
Respuesta:
-3z-1=20
-3z=20+1
-3Z=21
-z=21/3
-z=7
z=7/1
z=7