(40-x)=(3x)

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Solution for (40-x)=(3x) equation: 



(40-x)=(3x)

We move all terms to the left:

(40-x)-((3x))=0

determiningTheFunctionDomain
(40-x)-3x=0

We add all the numbers together, and all the variables

(-1x+40)-3x=0

We add all the numbers together, and all the variables

-3x+(-1x+40)=0

We get rid of parentheses

-3x-1x+40=0

We add all the numbers together, and all the variables

-4x+40=0

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

-4x=-40

x=-40/-4

x=+10

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