7-7u=-7-9u

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



7-7u=-7-9u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-7u+9u+7+7=0

We add all the numbers together, and all the variables

2u+14=0

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

2u=-14

u=-14/2

u=-7

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