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va rog ex 8!!!!!!!!!!!!!!!

Va Rog Ex 8 class=

Răspuns :

28kl=28000l
29hl=2900l
a+b=28000
a-2900=b=>a=b+2900
b+b+2900=28000
2b=25100
b=12550=>a=28000-12550
a=15420