20=7x-2(3x-4)

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Solution for 20=7x-2(3x-4) equation: 



20=7x-2(3x-4)

We move all terms to the left:

20-(7x-2(3x-4))=0



We calculate terms in parentheses: -(7x-2(3x-4)), so:

7x-2(3x-4)

We multiply parentheses

7x-6x+8

We add all the numbers together, and all the variables

x+8

Back to the equation:

-(x+8)



We get rid of parentheses

-x-8+20=0

We add all the numbers together, and all the variables

-1x+12=0

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

-x=-12

x=-12/-1

x=+12

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