Question

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

Answer 1

a*3=b*4=>a=$\frac{b*4}{3}$
a+b=14=>$\frac{b*4}{3} +b=14=> \frac{7*b}{3} =14=>b= \frac{3*14}{7}=>b=6=>a=14-6=8$