Question

resolva a proporção x/2= y/3= z/5, sabendo que x+y+z=70

Answer 1

$\frac{x}{2} = \frac{y}{3} = \frac{z}{5} ~~~~e~~~x+y+z=70 \\ \\ \frac{x+y+z}{2+3+5} = \frac{70}{10} =7$
  
$\frac{x}{2} =7~~~~~~~~~~ \frac{y}{3} =7~~~~~~~~ \frac{z}{5} =7 \\ \\ x=14~~~~~~~~~y=21~~~~~~~z=35$

Answer 2

Resposta:

=3y=5zx+y+z=701070=7x=2×7=14y=3×7=21z=5×7=35

Usando a prova real fica

\begin{gathered}x + y + z = 70 \\ 14 + 21 + 35 = 70\end{gathered}x+y+z=7014+21+35=70