30-3x=31.5

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Solution for 30-3x=31.5 equation: 



30-3x=31.5

We move all terms to the left:

30-3x-(31.5)=0

We add all the numbers together, and all the variables

-3x-1.5=0

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

-3x=1.5

x=1.5/-3

x=-1/2

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