Question 1149085
b, Blue ribbons
w, White ribbons
r, Red ribbons


{{{system(b+w+r=43,b=w-2,r=w+3)}}}


More than one way to solve.
Maybe try rewriting first equation all in terms of one variable, using the second and third equations...


{{{b+w+r=43}}}
{{{(w-2)+w+(w+3)=43}}}
{{{3w+1=43}}}
{{{3w=42}}}
{{{w=14}}}-------------------and maybe you can finish from here.