30=18+0.12x

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Solution for 30=18+0.12x equation: 



30=18+0.12x

We move all terms to the left:

30-(18+0.12x)=0

We add all the numbers together, and all the variables

-(0.12x+18)+30=0

We get rid of parentheses

-0.12x-18+30=0

We add all the numbers together, and all the variables

-0.12x+12=0

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

-0.12x=-12

x=-12/-0.12

x=+100

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