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-x+5.5+2x=-3x-6.5
We move all terms to the left:
-x+5.5+2x-(-3x-6.5)=0
We add all the numbers together, and all the variables
x-(-3x-6.5)+5.5=0
We get rid of parentheses
x+3x+6.5+5.5=0
We add all the numbers together, and all the variables
4x+12=0
We move all terms containing x to the left, all other terms to the right
4x=-12
x=-12/4
x=-3
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