Question 13413: If I need to find the opposite of the expression 7x + 3x.
Answer by lainey(7) (Show Source):
You can put this solution on YOUR website! You could just switch the 2 numbers around, 3x + 7x
or maybe it would be 7x - 3x, because subtraction is the opposite of addition
Some teachers teach it differently, I'm sorry that I am not that much of a help.
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