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

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Solution for 3(x+7)=7(x-1) equation: 



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

We move all terms to the left:

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

We multiply parentheses

3x-(7(x-1))+21=0



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

7(x-1)

We multiply parentheses

7x-7

Back to the equation:

-(7x-7)



We get rid of parentheses

3x-7x+7+21=0

We add all the numbers together, and all the variables

-4x+28=0

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

-4x=-28

x=-28/-4

x=+7

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