The two 12-ft beams shownare to be moved horizontally with respect to each other and load $P$ shifted to a new position on $CD$ so that all three reactions are equal. How far apart will $R_2$ and $R_3$ then be? How far will $P$ be from D?

$P$ is 8 ft to the left of $D$.

$R_2$ and $R_3$ are 6 ft apart.

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