cine ma poate ajta varog ca nu am inteles!ex 5
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[(a:4+8):2 - 5] x 2=18
(a:4+8):2 - 5= 18:2=9
(a:4+8):2=9+5=14
a:4+8=14 x 2=28
a:4= 28-8=20
a=20:4=5