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12x-2+6x+5+4x-2+5x+15+9x+8+12x-4+10x-2+6-3=11
We move all terms to the left:
12x-2+6x+5+4x-2+5x+15+9x+8+12x-4+10x-2+6-3-(11)=0
We add all the numbers together, and all the variables
58x+10=0
We move all terms containing x to the left, all other terms to the right
58x=-10
x=-10/58
x=-5/29
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