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Afla numarul a din fiecare egalitate (4+a):6=8 (a-5):5=7 80:(6+a)=10

Răspuns :

AndreeaNC
(4+a):6=8                (a-5):5=7                              80:(6+a)=10
4+a=6*8                   (a-5=5*7                              6+a=80:10
       =48                          =35                                        =8
a=48-4                       a=35+5                               a=8-6
a=44                           a=40                                  a=2
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ForeverBestFriends
(4+a):6=8
4+a=6*8
4+a=48
a=44

(a-5):5=7
a-5=7*5
a-5=35
a=40

80:(6+a)=10
6+a=80:10
6+a=8
a=2

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