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3+9+3x+8=10x-6x+7x+4
We move all terms to the left:
3+9+3x+8-(10x-6x+7x+4)=0
We add all the numbers together, and all the variables
3x-(11x+4)+3+9+8=0
We add all the numbers together, and all the variables
3x-(11x+4)+20=0
We get rid of parentheses
3x-11x-4+20=0
We add all the numbers together, and all the variables
-8x+16=0
We move all terms containing x to the left, all other terms to the right
-8x=-16
x=-16/-8
x=+2
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