7z+5+3z=45

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Solution for 7z+5+3z=45 equation: 



7z+5+3z=45

We move all terms to the left:

7z+5+3z-(45)=0

We add all the numbers together, and all the variables

10z-40=0

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

10z=40

z=40/10

z=4

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