-1=3u+-13

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Solution for -1=3u+-13 equation: 



-1=3u+-13

We move all terms to the left:

-1-(3u+-13)=0

We add all the numbers together, and all the variables

-(3u-13)-1=0

We get rid of parentheses

-3u+13-1=0

We add all the numbers together, and all the variables

-3u+12=0

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

-3u=-12

u=-12/-3

u=+4

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