a+b+c=603
[tex]b= \frac{a}{3} [/tex]
[tex]c= \frac{7}{45}*a [/tex]
[tex]a+ \frac{a}{3} + \frac{7}{45} a=603[/tex]
aducem la numitor comun adica la 45 si vom avea
45a+15a+7a=27135
67a=27135
a=27135:67
a=405
[tex]b= \frac{a}{3}= \frac{405}{3}=135 [/tex]
[tex]c= \frac{7}{45}*a= \frac{7}{45}*405= \frac{2835}{45}=63 [/tex]
