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Problem $03\mathrm{.}084-$ A force is applied to a bracket

A $84-$lb vertical force $P$ is applied at $A$ to the bracket shown, which is held by screws at $B$ and $C.$

Problem $03\mathrm{.}084.$b $-$ Equivalent couples

Find the two horizontal forces at $B$ and $C$ that are equivalent to the couple obtained in part $a.$

The force at $B$ is

lblarr.

The force at $C$ is

$lb.$