Question 1207291
Initially x black beads and 5x white beads


{{{2+2x}}} were added to the black beads; so now {{{2+2x+x=3x+2}}} black beads.


Still, {{{highlight_green(5x-(3x+2)=18)}}}.

{{{2x-2=18}}}

{{{x-1=9}}}

{{{highlight(x=10)}}}