20=-7u+2(u+5)

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Solution for 20=-7u+2(u+5) equation: 



20=-7u+2(u+5)

We move all terms to the left:

20-(-7u+2(u+5))=0



We calculate terms in parentheses: -(-7u+2(u+5)), so:

-7u+2(u+5)

We multiply parentheses

-7u+2u+10

We add all the numbers together, and all the variables

-5u+10

Back to the equation:

-(-5u+10)



We get rid of parentheses

5u-10+20=0

We add all the numbers together, and all the variables

5u+10=0

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

5u=-10

u=-10/5

u=-2

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