Question 763276
This is a proportion:


{{{(x-5)/(x+6)=(x-3)/(x+4)
}}}


{{{(x-5)(x+4)=(x-3)(x+6)}}}


{{{x^2-5x+4x-20=x^2-3x+6x-18}}}



{{{-x-20=3x-18}}}


{{{4x=-2}}}


{{{x=-1/2}}}


:)