z-z+3z+2z+2z=7

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Solution for z-z+3z+2z+2z=7 equation: 



z-z+3z+2z+2z=7

We move all terms to the left:

z-z+3z+2z+2z-(7)=0

We add all the numbers together, and all the variables

7z-7=0

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

7z=7

z=7/7

z=1

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