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Aflati termenul necunoscut din urm. proportii:
a. x/3=5/1
b. x/0,5=1/2 /3


Răspuns :

a)[tex] \frac{x}{3}= \frac{5}{1} [/tex]
x=3*5
x=15
b)[tex] \frac{x}{0,5} = 1/2/3[/tex]
[tex] \frac{x}{0,5} = \frac{1}{2} *3[/tex]
[tex] \frac{x}{0.5} = \frac{3}{2} [/tex]
x=[tex] \frac{3*0,5}{2} = \frac{4,5}{2} [/tex]
x=2,25