Question 500803
{{{12=a/36+17}}}
{{{12=17+a*1/36}}}
{{{17+a*1/36=12}}}
{{{a*1/36=-5}}}
{{{a=-5}}}divided by{{{1/36}}}
{{{a=-180}}}
check{{{12=-180/36+17}}}
{{{12=-5+17}}}
{{{12=12}}}
Q.E.D.