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39:2 3/5=c:1,4
nie ma znaku pomiędzy 39:2 a 3/5
2.
a)x=(5*6):3
x=30:3
x=10
b) x=(4*5):7
x=20:7
x=2 i 6/7
c) 3x=8/5 ||:3
x= 8\15