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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-4x-(5(-1x+40))-160=0



We calculate terms in parentheses: -(5(-1x+40)), so:

5(-1x+40)

We multiply parentheses

-5x+200

Back to the equation:

-(-5x+200)



We get rid of parentheses

-4x+5x-200-160=0

We add all the numbers together, and all the variables

x-360=0

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

x=360

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