-7=u+-4

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Solution for -7=u+-4 equation: 



-7=u+-4

We move all terms to the left:

-7-(u+-4)=0

We add all the numbers together, and all the variables

-(u-4)-7=0

We get rid of parentheses

-u+4-7=0

We add all the numbers together, and all the variables

-1u-3=0

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

-u=3

u=3/-1

u=-3

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