441=7z+21

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Solution for 441=7z+21 equation: 



441=7z+21

We move all terms to the left:

441-(7z+21)=0

We get rid of parentheses

-7z-21+441=0

We add all the numbers together, and all the variables

-7z+420=0

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

-7z=-420

z=-420/-7

z=+60

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