1+u=-7-u

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Solution for 1+u=-7-u equation: 



1+u=-7-u

We move all terms to the left:

1+u-(-7-u)=0

We add all the numbers together, and all the variables

u-(-1u-7)+1=0

We get rid of parentheses

u+1u+7+1=0

We add all the numbers together, and all the variables

2u+8=0

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

2u=-8

u=-8/2

u=-4

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