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X-(9+2X)2=-15
We move all terms to the left:
X-(9+2X)2-(-15)=0
We add all the numbers together, and all the variables
X-(2X+9)2-(-15)=0
We add all the numbers together, and all the variables
X-(2X+9)2+15=0
We multiply parentheses
X-4X-18+15=0
We add all the numbers together, and all the variables
-3X-3=0
We move all terms containing X to the left, all other terms to the right
-3X=3
X=3/-3
X=-1
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