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2014-03-18T17:34:29+02:00
 (4x3) +(2x3)
12+6
18 fire      
 
 1buchet......3 fire
 4buchete....x fire          
x= \frac{4x3}{1} = \frac{12}{1} =12
1buchet...3 fire
2buchete...x fire
x= \frac{2x3}{1} = \frac{6}{1} =6
 si 12+6=18 fire