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Daca a*3 = b*4 si a+b = 14 , atunci a = ?

Răspuns :

a*3=b*4=>a=[tex] \frac{b*4}{3} [/tex]
a+b=14=>[tex] \frac{b*4}{3} +b=14=> \frac{7*b}{3} =14=>b= \frac{3*14}{7}=>b=6=>a=14-6=8 [/tex]