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adelina 88 [10]
4 years ago
7

(+1)+(-1)=|| (2)+(-2) = 0 20+1) + (-2) = _ (+3) + 3(-1)= 37+2) + 2-3] =

Chemistry
1 answer:
larisa86 [58]4 years ago
6 0
  • 1+(-1)=0
  • 2+(-2)=0
  • 20+1+(-2)=19
  • 3+3(-1)=0
  • 37+2+2-3=38
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