30+3x-9=15

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Solution for 30+3x-9=15 equation: 



30+3x-9=15

We move all terms to the left:

30+3x-9-(15)=0

We add all the numbers together, and all the variables

3x+6=0

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

3x=-6

x=-6/3

x=-2

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