Question 896942
The way I would do it is the multiply each side by -{{{5/3}}}.  That isolates x.
-{{{3/5}}}x * -{{{5/3}}} = x
{{{4/5}}}* -{{{5/3}}} = -{{{20/15}}} which reduces to -1{{{1/3}}}
x = -1{{{1/3}}}<br>
Check:
-{{{3/5}}}* -1{{{1/3}}} = {{{12/15}}} which reduces to {{{4/5}}}
Success!