42=7(3x-9)

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Solution for 42=7(3x-9) equation: 



42=7(3x-9)

We move all terms to the left:

42-(7(3x-9))=0



We calculate terms in parentheses: -(7(3x-9)), so:

7(3x-9)

We multiply parentheses

21x-63

Back to the equation:

-(21x-63)



We get rid of parentheses

-21x+63+42=0

We add all the numbers together, and all the variables

-21x+105=0

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

-21x=-105

x=-105/-21

x=+5

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