30-2x=42

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Solution for 30-2x=42 equation: 



30-2x=42

We move all terms to the left:

30-2x-(42)=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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