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OpenStudy (anonymous):
12=21-3(11) gets a negative 12 not 12? How do I change that!?
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OpenStudy (anonymous):
21 - 3(11) = 21 - 33 = 21 - (21 + 12). You should expect to get a negative answer since you're subtracting more than 21 away from 21. 21 - (21 + 12) = 21 - 21 - 12 = - 12. You should get -12.
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