40=-2(5x+20)

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Solution for 40=-2(5x+20) equation: 



40=-2(5x+20)

We move all terms to the left:

40-(-2(5x+20))=0



We calculate terms in parentheses: -(-2(5x+20)), so:

-2(5x+20)

We multiply parentheses

-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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