[tex]a*1,3=a+3,72 \\ 1,3a=a+3,72[/tex]
[tex]\frac{13a}{10}=\frac{25a+93}{25} \\ \frac{13a}{10}-\frac{25a+93}{25}=0 \\ \frac{13a*5-[(25a+13)*2]}{50}=\frac{15a-186}{50}=0 \\ \frac{3*(5a-62)}{50}=0 \\ 3*(5a-62)=0*50 \\ 3*(5a-62)=0 \\ 5a-62=\frac{0}{3} \\ 5a-62=0 \\ 5a=0+62 \\ 5a=62 \\ a=\frac{62}{5} \\ a=12,4[/tex]
