Question 314575
I'm assuming you mean like this? Remember parentheses are a big help to remove any ambiguity (and they're free).
{{{2/(x + 9) + 5/(x + 2) = 3/(x^2 + 11x + 18)}}}
{{{2/(x + 9) + 5/(x + 2) = 3/((x+2)(x+9))}}}
Multiply both sides by {{{(x+2)(x+9)}}}
{{{2(x+2)+5(x+9)=3}}}
{{{2x+4+5x+45=3}}}
{{{7x+49=3}}}
{{{7x=-46}}}
{{{highlight_green(x=-46/7)}}}