7+2u=-5-u

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Solution for 7+2u=-5-u equation: 



7+2u=-5-u

We move all terms to the left:

7+2u-(-5-u)=0

We add all the numbers together, and all the variables

2u-(-1u-5)+7=0

We get rid of parentheses

2u+1u+5+7=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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