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3x=-x-8.6
We move all terms to the left:
3x-(-x-8.6)=0
We add all the numbers together, and all the variables
3x-(-1x-8.6)=0
We get rid of parentheses
3x+1x+8.6=0
We add all the numbers together, and all the variables
4x+8.6=0
We move all terms containing x to the left, all other terms to the right
4x=-8.6
x=-8.6/4
x=-2+0.6/4
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