SOLUTION: Combine like terms -9x-3x+7 could you show me how it is done so I can learn

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Question 888008: Combine like terms
-9x-3x+7 could you show me how it is done so I
can learn
Answer by dv2016(7) About Me  (Show Source):
You can put this solution on YOUR website!
Like goes to like, so the x's combine and the constants as well
-9x-3x= -12x
Since 7 is alone, it remains the same
Now combine all the terms
Answer: -12x+7