I am doing homework on Combine Like terms. But I came to a problem that i just need to know the "how to" on this one. -2n - (9 - 10n) Now the answer is 8n - 9 I got at first -12n - 9 Can someone just explain the proper steps for this problem?
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Originally Posted by queequeeg I am doing homework on Combine Like terms. But I came to a problem that i just need to know the "how to" on this one. -2n - (9 - 10n) Now the answer is 8n - 9 I got at first -12n - 9 Can someone just explain the proper steps for this problem?
Remember that two negatives equals a positive. The "-10" is negative, so when you subtract from a negative 10 you get positive 10.
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