20=-3(2x+1)-7x

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Solution for 20=-3(2x+1)-7x equation: 



20=-3(2x+1)-7x

We move all terms to the left:

20-(-3(2x+1)-7x)=0



We calculate terms in parentheses: -(-3(2x+1)-7x), so:

-3(2x+1)-7x

We add all the numbers together, and all the variables

-7x-3(2x+1)

We multiply parentheses

-7x-6x-3

We add all the numbers together, and all the variables

-13x-3

Back to the equation:

-(-13x-3)



We get rid of parentheses

13x+3+20=0

We add all the numbers together, and all the variables

13x+23=0

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

13x=-23

x=-23/13

x=-1+10/13

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