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Va rog frumos
Dau coroana ....
Ex 5


Va Rog Frumos Dau Coroana Ex 5 class=

Răspuns :

a/b=2/3, 3a=2b,b=3a/2 inlocuim
a)a-b=25,1, a-3a/2=25,1, 2a-3a=50,2,a=-50,2
-50,2-b=25,1, b=-75,3
b)a+b=63,5, a+3a/2=63,5, 2a+3a=127, 5a=127, a=127/5=25,4
a+b=63,5, b=63,5-a=63,5-25,4=38,1