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35=3x+12
We move all terms to the left:
35-(3x+12)=0
We get rid of parentheses
-3x-12+35=0
We add all the numbers together, and all the variables
-3x+23=0
We move all terms containing x to the left, all other terms to the right
-3x=-23
x=-23/-3
x=7+2/3
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