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9x-27+12x-1+3x+4=180
We move all terms to the left:
9x-27+12x-1+3x+4-(180)=0
We add all the numbers together, and all the variables
24x-204=0
We move all terms containing x to the left, all other terms to the right
24x=204
x=204/24
x=8+1/2
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