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0=65-(2.1d)
We move all terms to the left:
0-(65-(2.1d))=0
We add all the numbers together, and all the variables
-(65-(+2.1d))+0=0
We add all the numbers together, and all the variables
-(65-(+2.1d))=0
We calculate terms in parentheses: -(65-(+2.1d)), so:We get rid of parentheses
65-(+2.1d)
determiningTheFunctionDomain -(+2.1d)+65
We get rid of parentheses
-2.1d+65
Back to the equation:
-(-2.1d+65)
2.1d-65=0
We move all terms containing d to the left, all other terms to the right
2.1d=65
d=65/2.1
d=30+1/1.05
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