Question 557654
{{{ ( 67 + 78 + 80 + 85 + 88 + 90 + 100 + x ) / 8 = 85 }}}
{{{ ( 588 + x ) / 8 = 85 }}}
{{{ 588 + x = 680 }}}
{{{ x = 680 - 588 }}}
{{{ x = 92 }}}
The 8th test should be 92