-7u-(-4u)-(-7u)+5u-9=18

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Solution for -7u-(-4u)-(-7u)+5u-9=18 equation: 



-7u-(-4u)-(-7u)+5u-9=18

We move all terms to the left:

-7u-(-4u)-(-7u)+5u-9-(18)=0

We add all the numbers together, and all the variables

-2u-(-4u)-(-7u)-27=0

We get rid of parentheses

-2u+4u+7u-27=0

We add all the numbers together, and all the variables

9u-27=0

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

9u=27

u=27/9

u=3

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