.40(x+40)=-4

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



.40(x+40)=-4

We move all terms to the left:

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

We add all the numbers together, and all the variables

.40(x+40)+4=0

We multiply parentheses

0.4x+16+4=0

We add all the numbers together, and all the variables

0.4x+20=0

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

0.4x=-20

x=-20/0.4

x=-50

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