30-9x=-12x

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Solution for 30-9x=-12x equation: 



30-9x=-12x

We move all terms to the left:

30-9x-(-12x)=0

We get rid of parentheses

-9x+12x+30=0

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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