-20=(u-3)-8u

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Solution for -20=(u-3)-8u equation: 



-20=(u-3)-8u

We move all terms to the left:

-20-((u-3)-8u)=0



We calculate terms in parentheses: -((u-3)-8u), so:

(u-3)-8u

We add all the numbers together, and all the variables

-8u+(u-3)

We get rid of parentheses

-8u+u-3

We add all the numbers together, and all the variables

-7u-3

Back to the equation:

-(-7u-3)



We get rid of parentheses

7u+3-20=0

We add all the numbers together, and all the variables

7u-17=0

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

7u=17

u=17/7

u=2+3/7

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