X=20+3*x

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Solution for X=20+3*x equation: 



X=20+3X

We move all terms to the left:

X-(20+3X)=0

We add all the numbers together, and all the variables

X-(3X+20)=0

We get rid of parentheses

X-3X-20=0

We add all the numbers together, and all the variables

-2X-20=0

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

-2X=20

X=20/-2

X=-10

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