ANSWER
50
EXPLANATION
We have that:
5 = J / 10
To find the value of J, we will multiply both sides by 10:
[tex]\begin{gathered} 5\cdot\text{ 10 = }\frac{J}{10}\cdot\text{ 10} \\ \Rightarrow\text{ 50 = J or J = 50} \end{gathered}[/tex]That is the value of J