Question 421073
Let {{{x}}} = number of more games they will have to play
given:
{{{x/2}}} = number of games they win out of {{{x}}} more games
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{{{ (15 + x/2)/(20 + x) = .6 }}}
{{{ 15 + x/2 = .6*(20 + x) }}}
{{{ 15 + .5x = 12 + .6x }}}
{{{ .1x = 3 }}}
{{{ x = 30 }}}
They have to play 30 more games
check:
{{{ (15 + 30/2)/(20 + 30) = .6 }}}
{{{ (15 + 15)/50 = .6 }}}
{{{ 30/50 = .6}}}
{{{30 = .6*50}}}
{{{30 = 30}}}
OK