4u+20=-4(u-9)

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Solution for 4u+20=-4(u-9) equation: 



4u+20=-4(u-9)

We move all terms to the left:

4u+20-(-4(u-9))=0



We calculate terms in parentheses: -(-4(u-9)), so:

-4(u-9)

We multiply parentheses

-4u+36

Back to the equation:

-(-4u+36)



We get rid of parentheses

4u+4u-36+20=0

We add all the numbers together, and all the variables

8u-16=0

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

8u=16

u=16/8

u=2

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