Question 391716
{{{5*(18-V)=3*(18+V)}}}
{{{5*18-5V=3*18+3V}}}
{{{5*18-5V+5V=3*18+3V+5V}}}
{{{5*18=3*18+8V}}}
{{{5*18-3*18=3*18+8V-3*18}}}
{{{2*18=8V}}}
{{{8V=2*18}}}
{{{V=2*18/8}}}
{{{V=4.5}}}
V=4.5mph