20=4(u+2)-7u

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Solution for 20=4(u+2)-7u equation: 



20=4(u+2)-7u

We move all terms to the left:

20-(4(u+2)-7u)=0



We calculate terms in parentheses: -(4(u+2)-7u), so:

4(u+2)-7u

We add all the numbers together, and all the variables

-7u+4(u+2)

We multiply parentheses

-7u+4u+8

We add all the numbers together, and all the variables

-3u+8

Back to the equation:

-(-3u+8)



We get rid of parentheses

3u-8+20=0

We add all the numbers together, and all the variables

3u+12=0

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

3u=-12

u=-12/3

u=-4

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