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Mathematics 13 Online
OpenStudy (anonymous):

-21a+16a

OpenStudy (anonymous):

-21a + 16a when a negative and positive are added together, you actually subtract and take the sign of the bigger number so, -21a + 16a = - 5

OpenStudy (anonymous):

oops..-5a...can't forget the a

OpenStudy (anonymous):

thx again

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