(X-20)+x=425

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Solution for (X-20)+x=425 equation: 



(X-20)+X=425

We move all terms to the left:

(X-20)+X-(425)=0

We add all the numbers together, and all the variables

X+(X-20)-425=0

We get rid of parentheses

X+X-20-425=0

We add all the numbers together, and all the variables

2X-445=0

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

2X=445

X=445/2

X=222+1/2

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