9=30+7x

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Solution for 9=30+7x equation:



9=30+7x
We move all terms to the left:
9-(30+7x)=0
We add all the numbers together, and all the variables
-(7x+30)+9=0
We get rid of parentheses
-7x-30+9=0
We add all the numbers together, and all the variables
-7x-21=0
We move all terms containing x to the left, all other terms to the right
-7x=21
x=21/-7
x=-3

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