a) 1 4/7+ b = 3 1/3. +sprawdzenie b) d-1 1/4=2 2/3. + sprawdzenie c) 1 1/5-u=5/ . + sprawdzenie Prosze o szybką odpowiedź.

A ) 1 i 4/7 + b = 3 i 1/3 11/7+b = 10/3 33/21 +b = 70/21     /-33/21 b = 37/21 SPR 1 i 4/7 + 37/21 = 3 i 1/3 33/21 + 37 21 = 70/21 70/21 = 70/21 L =P B) d - 5/4 = 8/3 d - 15/12 = 32/12   /+15/12 d = 47/12 SPR 47/12 - 15/12 = 32/12 32/12 = 32/12 L=P C) 6/5 - u = 5          /-6/5 -u = 3 i 4/5             /*-1 u = -3 i 4/5 SPR 6/5 - (-3 i 4/5) = 5 6/5 + 3 i 4/5 = 5 1 i 1/5 + 3 i 4/5 = 5 5 = 5 L=P