u-10=-9u

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Solution for u-10=-9u equation: 



u-10=-9u

We move all terms to the left:

u-10-(-9u)=0

We get rid of parentheses

u+9u-10=0

We add all the numbers together, and all the variables

10u-10=0

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

10u=10

u=10/10

u=1

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