Răspuns :
a+b=434,5
a/3=2b/5
5a=6b
prima relatie o inmultim cu 6
6a+6b=2607
6a+5a=2607
11a=2607, a=2607:11=237
237/3=2b/5
79=2b/5
b=79x5/2=197,5
verificare
237+197,5=434,5
a/3=2b/5
5a=6b
prima relatie o inmultim cu 6
6a+6b=2607
6a+5a=2607
11a=2607, a=2607:11=237
237/3=2b/5
79=2b/5
b=79x5/2=197,5
verificare
237+197,5=434,5
[tex]a+b= 434. 5
[/tex]
[tex] \frac{a}{3} = \frac{2b}{5} [/tex] [tex]=\ \textgreater \ a= \frac{6b}{5} [/tex]
[tex] \frac{6b}{5} +b= 434.5 [/tex]
[tex]6b+5b= 2172.5 =\ \textgreater \ 11b= 2172.5 =\ \textgreater \ b= 2172.5:11[/tex]
[tex]b= 197.5 [/tex]
[tex]a= \frac{b*197,5}{5} =\ \textgreater \ a= 237. [/tex]
[tex][v; a+b= 237+197,5= 434,5][/tex]
[tex] \frac{a}{3} = \frac{2b}{5} [/tex] [tex]=\ \textgreater \ a= \frac{6b}{5} [/tex]
[tex] \frac{6b}{5} +b= 434.5 [/tex]
[tex]6b+5b= 2172.5 =\ \textgreater \ 11b= 2172.5 =\ \textgreater \ b= 2172.5:11[/tex]
[tex]b= 197.5 [/tex]
[tex]a= \frac{b*197,5}{5} =\ \textgreater \ a= 237. [/tex]
[tex][v; a+b= 237+197,5= 434,5][/tex]