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2014-05-06T21:52:32+03:00
820:2 =420  620:2=310   a-b=420-310  a-b=110
  • Utilizator Brainly
2014-05-06T21:53:01+03:00
A+a=840
2a=840
a=840:2
a=420

b+b=620
2b=620
b=620:2
b=310

a-b=?
420-310=110 
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