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8+12x=8x+x
We move all terms to the left:
8+12x-(8x+x)=0
We add all the numbers together, and all the variables
12x-(+9x)+8=0
We get rid of parentheses
12x-9x+8=0
We add all the numbers together, and all the variables
3x+8=0
We move all terms containing x to the left, all other terms to the right
3x=-8
x=-8/3
x=-2+2/3
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