Question 172018
{{{-9 = 6/y}}}
Cross multiply:
{{{-9y=6}}}, Isolate {{{y}}} by  dividing {{{-9}}}
{{{cross(-9)y/cross(-9)=6/-9}}}
{{{y=-cross(6)2/cross(9)3}}}
{{{highlight(y=-2/3)}}}
check,
{{{-9=6/(-2/3)}}}
{{{-9=6*(-3/2)}}}
{{{-9=-18/2}}}
{{{-9=-9}}}
Thank you,
Jojo