-3-7z=-3-9z

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Solution for -3-7z=-3-9z equation: 



-3-7z=-3-9z

We move all terms to the left:

-3-7z-(-3-9z)=0

We add all the numbers together, and all the variables

-7z-(-9z-3)-3=0

We get rid of parentheses

-7z+9z+3-3=0

We add all the numbers together, and all the variables

2z=0

z=0/2

z=0

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