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-5.5(d-2-)=-12.1
We move all terms to the left:
-5.5(d-2-)-(-12.1)=0
We add all the numbers together, and all the variables
-5.5(+d)-(-12.1)=0
We add all the numbers together, and all the variables
-5.5(+d)+12.1=0
We multiply parentheses
-5.5d+12.1=0
We move all terms containing d to the left, all other terms to the right
-5.5d=-12.1
d=-12.1/-5.5
d=2+1/5
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