Odpowiedź:
b)
x = (2 3/4 : 1/7 - 22)/[6 - (- 5)] + 1 3/4= (11/4 * 7 - 22)/(6 + 5) + 1 3/4 =
(77/4 - 22)/11 + 1 3/4 = (19,25 - 22)/11 + 1 3/4 = - 2,75/11 + 1 3/4 =
= - 2 3/4 : 11 + 1 3/4 = - 11/4 * 1/11 + 1 3/4 = - 1/4 + 1 3/4 = 1 2/4 = 1 1/2
y = (6/11 - 15/45 * 2 3/4)/(11/3 - 2 1/2) = (6/11 - 1/3 * 11/4)/(3 2/3 - 2 1/2) =
= (6/11 - 11/12)/(3 4/6 - 2 3/6) = (72/132 - 121/132)/(1 1/6) = - 49/132 : 7/6 =
= - 49/132 * 6/7 = - 7/22
z = 2 - (8 - 1/2)/(12 + 1/2) = 2 - 7 1/2 : 12 1/2 = 2 - 15/2 : 25/2 = 2 - 15/2 * 2/25 =
= 2 - 3 * 1/5 = 2 - 3/5 = 1 5/5 - 3/5 = 1 2/5 = 1,4
