-40=-4x+2(-3x+20)

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Solution for -40=-4x+2(-3x+20) equation: 



-40=-4x+2(-3x+20)

We move all terms to the left:

-40-(-4x+2(-3x+20))=0



We calculate terms in parentheses: -(-4x+2(-3x+20)), so:

-4x+2(-3x+20)

We multiply parentheses

-4x-6x+40

We add all the numbers together, and all the variables

-10x+40

Back to the equation:

-(-10x+40)



We get rid of parentheses

10x-40-40=0

We add all the numbers together, and all the variables

10x-80=0

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

10x=80

x=80/10

x=8

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