-2(x+40)=4(5-x)

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Solution for -2(x+40)=4(5-x) equation: 



-2(x+40)=4(5-x)

We move all terms to the left:

-2(x+40)-(4(5-x))=0

We add all the numbers together, and all the variables

-2(x+40)-(4(-1x+5))=0

We multiply parentheses

-2x-(4(-1x+5))-80=0



We calculate terms in parentheses: -(4(-1x+5)), so:

4(-1x+5)

We multiply parentheses

-4x+20

Back to the equation:

-(-4x+20)



We get rid of parentheses

-2x+4x-20-80=0

We add all the numbers together, and all the variables

2x-100=0

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

2x=100

x=100/2

x=50

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