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VA rog repede multumesc

VA Rog Repede Multumesc class=

Răspuns :

a-cl1, b=cl4
a+b=100=>a=100-b
7a+10b=877
7(100-b)+10b=877
700-7b+10b=877
3b=177
b=59 elevi cl4
a=100-59=41 elevi cl1