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X+9=-5X-9
We move all terms to the left:
X+9-(-5X-9)=0
We get rid of parentheses
X+5X+9+9=0
We add all the numbers together, and all the variables
6X+18=0
We move all terms containing X to the left, all other terms to the right
6X=-18
X=-18/6
X=-3
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