630=x-x(.30)

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Solution for 630=x-x(.30) equation: 



630=x-x(.30)

We move all terms to the left:

630-(x-x(.30))=0

We add all the numbers together, and all the variables

-(x-x(0.3))+630=0



We calculate terms in parentheses: -(x-x(0.3)), so:

x-x(0.3)

We multiply parentheses

x-0.3x

We add all the numbers together, and all the variables

0.7x

Back to the equation:

-(0.7x)



We add all the numbers together, and all the variables

-(+0.7x)+630=0

We get rid of parentheses

-0.7x+630=0

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

-0.7x=-630

x=-630/-0.7

x=+900

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