189=3(7-7x)

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Solution for 189=3(7-7x) equation: 



189=3(7-7x)

We move all terms to the left:

189-(3(7-7x))=0

We add all the numbers together, and all the variables

-(3(-7x+7))+189=0



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

3(-7x+7)

We multiply parentheses

-21x+21

Back to the equation:

-(-21x+21)



We get rid of parentheses

21x-21+189=0

We add all the numbers together, and all the variables

21x+168=0

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

21x=-168

x=-168/21

x=-8

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