zad 1
a)
[tex]\frac{x}{1,5} =\frac{14}{4\frac{1}{5} } \\4\frac{1}{5}x=21\\x=5[/tex]
b)
[tex]\frac{2\frac{2}{3} }{3\frac{3}{7} }= \frac{7}{x} \\2\frac{2}{3}x=7*\frac{24}{7} \\2\frac{2}{3}x=24\\x=9[/tex]
zad 2
a)
4x=1,44
x=0,36
b)
5x-25=21
5x=46
x=9,2
c)
5x-10=6x+21
x+21=-10
x=-31
