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a/25=14/35
a=?
a/8=7/b
ab-56=?
5/x=y/6 100-3xy =??


Răspuns :

sper sa intelegi ideea
Vezi imaginea CONICO
[tex] \frac{a}{25}= \frac{14}{35} =\ \textgreater \ 35a=350 => a=10 [/tex]

[tex] \frac{a}{8}= \frac{7}{b} =\ \textgreater \ ab=56 [/tex]

56-56=0

[tex] \frac{5}{x}= \frac{y}{6} =\ \textgreater \ xy=30[/tex]

De unde 100-3*30=100-90=10