Respuesta :

AL2006
Louisa's three steps are all correct.

Sadly, when she put '56' in place of 'x', the equation says that 11 = 25,
and everybody knows that's not true.

That means that '56' is NOT the solution to the original equation.
(The dot is marked in the correct circle.)

I just looked at the original equation and I tried to solve it in my head.
I got negative 56.  Maybe you'd like to check that out.