Respuesta :

z=1/5

Subtract 85 from both sides which gets you 25z=5.


Divide both sides by 25 which is z=5/25

Simplify which gives us the answer z=1/5.
Izzy1974

Answer:

1/5 or 0.2

Step-by-step explanation:

25z+85=90. subtract 85 from both sides. 25z=-5. divide by 25. z=1/5 or 0.2

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