30-4x=40+x

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Solution for 30-4x=40+x equation: 



30-4x=40+x

We move all terms to the left:

30-4x-(40+x)=0

We add all the numbers together, and all the variables

-4x-(x+40)+30=0

We get rid of parentheses

-4x-x-40+30=0

We add all the numbers together, and all the variables

-5x-10=0

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

-5x=10

x=10/-5

x=-2

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