Question 707997
{{{x}}} = number of pairs of shoes bought
{{{3x}}}= number of pairs of boots bought
${{{20x}}}= amount spent on shoes
${{{60(3x)=180x}}}= amount spent on boots
{{{20x+180x=8000}}} --> {{{200x=8000}}} --> {{{200x/200=8000/200}}} --> {{{highlight(x=40)}}} --> {{{highlight(3x=120)}}}
They bought {{{highlight(40)}}} pairs of shoes and {{{highlight(120)}}} pairs of boots.