2u=-7u-9

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Solution for 2u=-7u-9 equation: 



2u=-7u-9

We move all terms to the left:

2u-(-7u-9)=0

We get rid of parentheses

2u+7u+9=0

We add all the numbers together, and all the variables

9u+9=0

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

9u=-9

u=-9/9

u=-1

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