4=-4(u-18)

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Solution for 4=-4(u-18) equation: 



4=-4(u-18)

We move all terms to the left:

4-(-4(u-18))=0



We calculate terms in parentheses: -(-4(u-18)), so:

-4(u-18)

We multiply parentheses

-4u+72

Back to the equation:

-(-4u+72)



We get rid of parentheses

4u-72+4=0

We add all the numbers together, and all the variables

4u-68=0

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

4u=68

u=68/4

u=17

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