JOINT by JOINT $($pg $3)$

Next Joint with only $2$ unmarked members is D

${}_x=0$

$450lb+350lbs-F=0$

$F=800lbs$

${\displaystyle \underset{-400lb+750lbs-D=0}{\overset{Y}{}}}=0_O$

$D=-350lbs$

${}_y=0$

$350-150-1200+E=0$

$E=800lbs$

Joint E FROM OTHER JOINTSJOINT by JOINT $($pg $2)$

Joint with only $2$ unknow members $($unmarked$)$JOINT by JOINT $($pg $1)$

By Equilibrium equations, find Reactions