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(-1 1/6-5 3/5)*(-12):1,1=(-1 5/30-5 18/30)*(-12):1,1=(-6 23/30)*(-12):1,1=203/30*12/1:1,1=1218/15:1,1=1218/3*10/11=2439/33=73 27/33=73 9/11
(-7/6 - 28/5) * (-12) : 1,1 = (-35/30-168/30) * (-12) : 1,1 = (-203/30)* (-12) : 1,1 = [skracamy 30 i 12 przez 6] (-203/5)*(-2):1,1 = 406/5 : 11/10 = 406/5 * 10/11 [skracamy 5 i 10 przez 5] 406 * 2/11 = 812/11 = 73 9/11