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6x+(-15)=87
We move all terms to the left:
6x+(-15)-(87)=0
determiningTheFunctionDomain 6x-87+(-15)=0
We add all the numbers together, and all the variables
6x-102=0
We move all terms containing x to the left, all other terms to the right
6x=102
x=102/6
x=17
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