z*10-1=3

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Solution for z*10-1=3 equation: 



z*10-1=3

We move all terms to the left:

z*10-1-(3)=0

We add all the numbers together, and all the variables

z*10-4=0

Wy multiply elements

10z-4=0

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

10z=4

z=4/10

z=2/5

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