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-3+3x=-3x+30
We move all terms to the left:
-3+3x-(-3x+30)=0
We get rid of parentheses
3x+3x-30-3=0
We add all the numbers together, and all the variables
6x-33=0
We move all terms containing x to the left, all other terms to the right
6x=33
x=33/6
x=5+1/2
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