Question 217245
if you are finding the solution of x ,
use cross multiply
so , 
(2x - 1)(3x + 4) = (x + 4)(x + 3)
6x^2 + 8x - 3x - 4 = x^2 + 3x + 4x + 12
6x^2 - x^2 + 5x - 7x - 4 - 12 = 0
5x^2 - 2x - 16 = 0

use {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
so it will be 
{{{x = (-(-2) +- sqrt( (-2)^2-4*(5)*(-16) ))/(2*(5)) }}} 
{{{x = ( 2 +- sqrt( 324 ))/( 10 ) }}} 
2 +- 18 / 10
x = (2+18)/10 or (2-18)/10
x = 2 or -1.6