Question

решите уравнение frac{3-x}{x+1}=0

Answer 1

(3-x)/(x+1) = 0
3 - x = 0
x = 3
x + 1 ≠ 0
x ≠ -1

Answer 2

$frac{3-x}{x+1}=0 , x+1 neq 0$
3-x=0  
-x=-3 
x=3