Relax

Respuesta :

I hope it helps you get it right
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Answer:

z = 1/3.

Step-by-step explanation:

Z+4(2z+3)=15

= z + 4*2z + 4*3 = 15

= z + 8z + 12 = 15

9z = 15 - 12

9z = 3

z = 1/3.