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54-x+3=3x-9
We move all terms to the left:
54-x+3-(3x-9)=0
We add all the numbers together, and all the variables
-1x-(3x-9)+57=0
We get rid of parentheses
-1x-3x+9+57=0
We add all the numbers together, and all the variables
-4x+66=0
We move all terms containing x to the left, all other terms to the right
-4x=-66
x=-66/-4
x=16+1/2
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