d-(7+2)=12

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Solution for d-(7+2)=12 equation: 



d-(7+2)=12

We move all terms to the left:

d-(7+2)-(12)=0

determiningTheFunctionDomain
d-12-(7+2)=0

We add all the numbers together, and all the variables

d-12-9=0

We add all the numbers together, and all the variables

d-21=0

We move all terms containing d to the left, all other terms to the right

d=21

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