7=22-z

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Solution for 7=22-z equation: 



7=22-z

We move all terms to the left:

7-(22-z)=0

We add all the numbers together, and all the variables

-(-1z+22)+7=0

We get rid of parentheses

1z-22+7=0

We add all the numbers together, and all the variables

z-15=0

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

z=15

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