Answer:
[tex]r\text{ = }\frac{uj}{56}[/tex]Explanation:
Here, we want to solve for r
Solving for r means we have to isolate it at either the left hand side of the equation or the right hand side
To isolate it, all the values attached to it must go to the other side
We can proceed with this as follows:
[tex]\begin{gathered} u\text{ }\times j\text{ = r56} \\ r\text{ = }\frac{uj}{56} \end{gathered}[/tex]