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a+b=25
b+c=35
calculati
3a+6b+3c=?


Răspuns :

35-25=10 b
25-10=15 a
35-10=25 c
3×15+6×10+3×25=
=45+60+75
=180♡♡♡
a = 15
b = 10
c = 25
3*15+6*10+3*25=180