Question 658100
You're close, but you have the first two terms reversed.  The formula is:
{{{x - x/5 = 84}}}
{{{(5/5) * x - x/5 = 84}}}
{{{5x/5 - x/5 = 84}}}
{{{(5x - x)/5 = 84}}}
{{{4x/5 = 84}}}
{{{5*(4x/5) = 5*84}}}
{{{4x = 420}}}
{{{x = 105}}}