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5x+3x+12=-6+2x+18+6x
We move all terms to the left:
5x+3x+12-(-6+2x+18+6x)=0
We add all the numbers together, and all the variables
5x+3x-(8x+12)+12=0
We add all the numbers together, and all the variables
8x-(8x+12)+12=0
We get rid of parentheses
8x-8x-12+12=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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