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QveST [7]
3 years ago
9

I need help with 19 20 21

Mathematics
1 answer:
lord [1]3 years ago
5 0
19) 5c+c=-6+2
      6c=-4
      c=-4/6
      c=-2/3

20) -20-8=-2e
       -28=-2e
       28/2=e
      14=e

21)p-2w=2l
     (p-2w)/2=l
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