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 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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