Question 1082807

if triangle {{{ABC}}} is congruent to triangle {{{DFE}}}, angle {{{F}}} is congruent to angle {{{B=100}}} 

if angle {{{F=2x+1}}} degrees, than {{{2x+1=100}}}...solve for {{{x}}}

{{{2x=100-1}}}

{{{2x=99}}}

{{{x=99/2}}}

{{{x=49.5}}}