3x-15=-99

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Solution for 3x-15=-99 equation: 



3x-15=-99

We move all terms to the left:

3x-15-(-99)=0

We add all the numbers together, and all the variables

3x+84=0

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

3x=-84

x=-84/3

x=-28

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