SOLUTION: -7+3= 9+(20)= -12+(-13)

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Question 702782: -7+3=
9+(20)=
-12+(-13)
Answer by mathbird(71) About Me  (Show Source):
You can put this solution on YOUR website!
-7+3=-4
9+(20)=29
-12+(-13)=
-12-13
=-25