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4a-10-(-100)=12
We move all terms to the left:
4a-10-(-100)-(12)=0
determiningTheFunctionDomain 4a-10-12-(-100)=0
We add all the numbers together, and all the variables
4a+78=0
We move all terms containing a to the left, all other terms to the right
4a=-78
a=-78/4
a=-19+1/2
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