20=-4(1-x)+3(x+1)

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Solution for 20=-4(1-x)+3(x+1) equation: 



20=-4(1-x)+3(x+1)

We move all terms to the left:

20-(-4(1-x)+3(x+1))=0

We add all the numbers together, and all the variables

-(-4(-1x+1)+3(x+1))+20=0



We calculate terms in parentheses: -(-4(-1x+1)+3(x+1)), so:

-4(-1x+1)+3(x+1)

We multiply parentheses

4x+3x-4+3

We add all the numbers together, and all the variables

7x-1

Back to the equation:

-(7x-1)



We get rid of parentheses

-7x+1+20=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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