7+6z-4=8z+21-4z

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Solution for 7+6z-4=8z+21-4z equation: 



7+6z-4=8z+21-4z

We move all terms to the left:

7+6z-4-(8z+21-4z)=0

We add all the numbers together, and all the variables

6z-(4z+21)+7-4=0

We add all the numbers together, and all the variables

6z-(4z+21)+3=0

We get rid of parentheses

6z-4z-21+3=0

We add all the numbers together, and all the variables

2z-18=0

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

2z=18

z=18/2

z=9

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