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ex. 4 si 5.va rog!urgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeent!

Ex 4 Si 5va Rogurgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeent class=

Răspuns :

4. subunitare 1/2  4/5  3/7  

   supraunitare 3/1  4/2  5/3

   echiunitare 1/1  4/4  5/5

5. 2*b + 3*t = 38     b+t = 15

   b=15-t  => 2*(15-t) + 3*t = 38

   => 30-2t + 3t = 38 =>

   => 30+t =38 => t=8

   => 2b = 38- 3*t =>

  => 2b = 38 - 24 =>

   => 2b = 14 => b = 7

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