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x(x)=12-6x
We move all terms to the left:
x(x)-(12-6x)=0
We add all the numbers together, and all the variables
xx-(-6x+12)=0
We get rid of parentheses
xx+6x-12=0
We add all the numbers together, and all the variables
6x+xx-12=0
We move all terms containing x to the left, all other terms to the right
6x+xx=12
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