Respuesta :

Multiply 15 to the parenthesis. 
12=15z-15/5
12=15z-3
Add 3 to both sides
15=15z
Simplify
1=z
140618

Answer:

The answer is z = 1

Step-by-step explanation:

12 = 15z-3

+3         +3

15=15z

15/15=1

z=1

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