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1=3x-12=313=90
We move all terms to the left:
1-(3x-12)=0
We get rid of parentheses
-3x+12+1=0
We add all the numbers together, and all the variables
-3x+13=0
We move all terms containing x to the left, all other terms to the right
-3x=-13
x=-13/-3
x=4+1/3
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