oblicz nieznana liczbe i sprawdż : 1-c=1/5 a+3 3/4 =5 1/4
1-c=1/5
c = 1 - 1/5
c = 5/5 - 1/5
c = 4/5
spr. 1 - c = 1 - 4/5 = 5/5 - 4/5 = 1/5
a+3 3/4 =5 1/4
a = 5 1/4 - 3 3/4
a = 4 5/4 - 3 3/4
a = 1 2/4
a = 1 1/2
spr. a + 3 3/4 = 1 2/4 + 3 3/4 = 4 5/4 = 5 1/4
1. 1-c=1/5
c =1-1/5
c =4/5 - to nasz nieznana liczba nr. 1
2. a+3 3/4 =5 1/4
a = 1 1/2 - to nasz nieznana liczba nr. 2
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1-c=1/5
c = 1 - 1/5
c = 5/5 - 1/5
c = 4/5
spr. 1 - c = 1 - 4/5 = 5/5 - 4/5 = 1/5
a+3 3/4 =5 1/4
a = 5 1/4 - 3 3/4
a = 4 5/4 - 3 3/4
a = 1 2/4
a = 1 1/2
spr. a + 3 3/4 = 1 2/4 + 3 3/4 = 4 5/4 = 5 1/4
1. 1-c=1/5
c =1-1/5
c =4/5 - to nasz nieznana liczba nr. 1
2. a+3 3/4 =5 1/4
a = 5 1/4 - 3 3/4
a = 1 2/4
a = 1 1/2 - to nasz nieznana liczba nr. 2