$R_1+R_2=25k,W=50PSf*10*50$

$12,500k$

$+C{M}_{R_1}=0$

$=25\mathrm{.}000lb$

$(2,5005)+(2,50010)+(2,50015)+(2,50020)+$

$(2,50025)+(2,50030)+(2,50035)+(2,50040)+$

$(2,50045)+(2,50050)=R_{2}50$

$R_1+R_2=25$kIps

$R_2=11\mathrm{.}500$ or $11\mathrm{.}5$kIps

$R_1+11\mathrm{.}5k=25k$

$R_1=13\mathrm{.}5k$

$AJ=\sqrt[\phantom{2}]{(10,000{)}^2+(10,000{)}^2}$

$AJ=14,142lb$ compression

solve for all trusses just like Joint A$.$