15ti3 piate dodac 14 t 2 piate dodac 16 t 4 piate dodac 16 t to ile dodac zeby bylo razem 80 t
15ti3 piate dodac 14 t 2 piate dodac 16 t 4 piate dodac 16 t to ile dodac zeby bylo razem 80 t
15 3/5t + 14 2/5t + 16 4/5t + 16t + x = 80t 30t + 32 4/5t + x = 80t 62 4/5t + x = 80t x = 80t - 62 4/5t x = 17 1/5t nalezy dodac 17 1/5t