suma p % liczby 6 i r% liczby 8 wynosi 5 . suma r % liczby 6 i liczby o p % wiekszej od 8 wynosi 12,8 .oblicz p i r.
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p*6 + r*8 = 5
r*6 + 8*(1+p) = 12,8
8r = 5-6p
r = 5/8 - 6/8p
6*(5/8 - 6/8p) + 8 + 8p = 12,8
30/8 - 36/8p + 8 + 8p = 12,8
8p - 36/8p = 12,8 - 30/8 - 8
64/8p - 36/8p = 12,8 - 3,75 - 8
28/8 p = 1,05
p = 0,3
r = 5/8 - 6/8p = 5/8 - 6/8 * 3/10 = 5/8 - 18/80 = 50/80 - 18/80 = 32/80 = 4/10 = 0,4
p = 0,3 = 30%
r = 0,4 = 40%