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3 5/7+ X= 4
traktujemy to jak zwyczajne rownanie piewszego stopnia
czyli obliczamy x
x = 4 - 3 5/7
x = 2/7
to wszystko
b)
5/9 + Y= 1
y = 1 - 5/9
y = 4/9
c)
3 8/10+ Z =5
z = 5 - 3 8/10
z = 1 2/10