Respuesta :

-23(3x - 4)3x = 56 <-- Start.
-69x + 92(3x) = 56 <-- Distributive law of property.
-207x^2 + 276 = 56 <-- Distributive law of property.
-207x^2 = -220 <-- Transpose the 276.
-207x = sqrt(-220) <-- Take the square root of both sides.

x = sqrt(-220) / -207