Odpowiedź:
zad. 2
a) 6x + 2/5x = 6 2/5x = 32/5 x
b) 7a + 5/9a = 7 5/9a = 68/9a
c) 4m - 3/5m = 3 2/5m = 17/5m
d) w - 2/7w = 5/7w
e) zrobione
f) 7p - 2,1p = 4,9p = 49/10p
zad. 3
a) 4/3x + 5/8x = (4/3 + 5/8)x = ( 32/24 + 20/24)x = 52/24x = 48 4/24x
b) 1,2x + 2/3x = (1,2 + 2/3)x = (12/10 + 2/3)x = (36/30 + 20/30)x = 56/30x =
= 1 26/30x = 1 13/15x
c) 1/4x + 5/6x - 1/2x = (1/4 + 5/6 - 1/2)x = (3/12 + 10/12 - 6/12)x =(13/12 - 6/12)x
= 7/12x
d) 3/7x - 0,2x + x = (3/7 - 2/10 + 1)x = (30/70 - 14/70 + 1)x = (16/70 + 1)x =
= 1 16/70 x = 1 8/35x
Szczegółowe wyjaśnienie:
