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Cum se rezolva ecuatia 3x+6x+9x+...+300x=151500
Va rog


Răspuns :

3x(1+2+3+   +100)=151500
x(1+2+3+   +100)=50500
(1+2+3   +100)=100*101/2=101*50=5050
x*5050=50500
x=50500/5050
x=10