z+81=91z

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Solution for z+81=91z equation: 



z+81=91z

We move all terms to the left:

z+81-(91z)=0

We add all the numbers together, and all the variables

-90z+81=0

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

-90z=-81

z=-81/-90

z=9/10

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