30-x=20+4.x

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Solution for 30-x=20+4.x equation: 



30-x=20+4.x

We move all terms to the left:

30-x-(20+4.x)=0

We add all the numbers together, and all the variables

-x-(4.x+20)+30=0

We add all the numbers together, and all the variables

-1x-(4.x+20)+30=0

We get rid of parentheses

-1x-4.x-20+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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