I figured out the first question, the second one in lost on.

Factor both of the equations, numerator and denominator

Cancel the like factors *excuse the zero im just showing you*

Combine frunctions

x-9=0
x+7=0
Restrictions are 9 and -7
( x + 1) / [ x( x + 1 )] + (2x) / [ x( x + 1 )] = ( 3x + 1 ) / [ x( x + 1 )] ;
The difference between 342 and 324 is different because the digits 2 and 4 are flipped.
342 and 324 are alike because they have the same amount of digits. hope that helped.