Question 120593
If the problem is {{{9/(2h)=-1}}},
{{{9/(2h)=-1}}}
{{{9/(2h)*(2/9)=-1*(2/9)}}} multiply both sides by 2/9
{{{1/h=-2/9}}} simplify
{{{h=-9/2}}} invert

If the problem is {{{9/2*h=-1}}},

{{{9/2*h=-1}}}
{{{9/2*h*(2/9)=-1*(2/9)}}}  multiply both sides by 2/9
{{{h=-2/9}}} simplify