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2014-11-11T22:09:18+02:00
A=nr ladite
b=nr lazi
7a+12b=940
a+b=95
a=95-b
7x(95-b)+12b=940
665-7b+12b=940
5b=275
b= 275/5=55 lazi
a=95-55=40 ladite
verificare
40x7kg+55x12kg=280+660=940 kg
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