7x+9=3*(3x+7)

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Solution for 7x+9=3*(3x+7) equation:



7x+9=3(3x+7)
We move all terms to the left:
7x+9-(3(3x+7))=0
We calculate terms in parentheses: -(3(3x+7)), so:
3(3x+7)
We multiply parentheses
9x+21
Back to the equation:
-(9x+21)
We get rid of parentheses
7x-9x-21+9=0
We add all the numbers together, and all the variables
-2x-12=0
We move all terms containing x to the left, all other terms to the right
-2x=12
x=12/-2
x=-6

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