225=25-u

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Solution for 225=25-u equation: 



225=25-u

We move all terms to the left:

225-(25-u)=0

We add all the numbers together, and all the variables

-(-1u+25)+225=0

We get rid of parentheses

1u-25+225=0

We add all the numbers together, and all the variables

u+200=0

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

u=-200

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