x-1=2(10-x)

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Solution for x-1=2(10-x) equation: 



x-1=2(10-x)

We move all terms to the left:

x-1-(2(10-x))=0

We add all the numbers together, and all the variables

x-(2(-1x+10))-1=0



We calculate terms in parentheses: -(2(-1x+10)), so:

2(-1x+10)

We multiply parentheses

-2x+20

Back to the equation:

-(-2x+20)



We get rid of parentheses

x+2x-20-1=0

We add all the numbers together, and all the variables

3x-21=0

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

3x=21

x=21/3

x=7

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