3x=7(3-x)

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Solution for 3x=7(3-x) equation: 



3x=7(3-x)

We move all terms to the left:

3x-(7(3-x))=0

We add all the numbers together, and all the variables

3x-(7(-1x+3))=0



We calculate terms in parentheses: -(7(-1x+3)), so:

7(-1x+3)

We multiply parentheses

-7x+21

Back to the equation:

-(-7x+21)



We get rid of parentheses

3x+7x-21=0

We add all the numbers together, and all the variables

10x-21=0

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

10x=21

x=21/10

x=2+1/10

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