4z-90=z

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Solution for 4z-90=z equation: 



4z-90=z

We move all terms to the left:

4z-90-(z)=0

We add all the numbers together, and all the variables

3z-90=0

We move all terms containing z to the left, all other terms to the right

3z=90

z=90/3

z=30

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