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0=30-(0.7*d)
We move all terms to the left:
0-(30-(0.7*d))=0
We add all the numbers together, and all the variables
-(30-(+0.7d))+0=0
We add all the numbers together, and all the variables
-(30-(+0.7d))=0
We calculate terms in parentheses: -(30-(+0.7d)), so:We get rid of parentheses
30-(+0.7d)
determiningTheFunctionDomain -(+0.7d)+30
We get rid of parentheses
-0.7d+30
Back to the equation:
-(-0.7d+30)
0.7d-30=0
We move all terms containing d to the left, all other terms to the right
0.7d=30
d=30/0.7
d=42+0.6/0.7
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