zabbalaa55 zabbalaa55

22-09-2017
Mathematics

contestada

is -7+9= -9 + 7 true , false or open
PLEASE HELP ME

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choixongdong choixongdong

22-09-2017

-7+9= -9 + 7 is false
cause
-7 + 9 = 2
-9 + 7 = -2

2 can't equal -2

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