215=83-u

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Solution for 215=83-u equation: 



215=83-u

We move all terms to the left:

215-(83-u)=0

We add all the numbers together, and all the variables

-(-1u+83)+215=0

We get rid of parentheses

1u-83+215=0

We add all the numbers together, and all the variables

u+132=0

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

u=-132

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