Resposta:
e) 0
Explicação passo-a-passo:
[tex]\dfrac{x+6}{3}=\dfrac{2x+10}{5}[/tex]
Multiplicando cruzado:
5 · (x + 6) = 3 · (2x + 10)
5x + 30 = 6x + 30
6x - 5x = 30 - 30
x = 0
[tex]\large\boxed{\begin{array}{l} \sf\dfrac{x + 6}{3} = \dfrac{2x + 10}{5} \\ \\ \sf{5(x + 6) = 3(2x + 10)} \\ \\ \sf{5x + 30 = 6x + 30} \\ \\ \sf{5x = 6x} \\ \\ \sf{5x - 6x = 0} \\ \\ \sf{ - x = 0 \: ( - 1)} \\ \\ \boxed{ \boxed{ \sf{x = 0}}} \leftarrow \textsf{Letra E}\end{array}}[/tex]
