Respuesta :
5 + r - 2 = 9 add 2 to both sides (because they are like terms)
+ 2 +2
5 + r = 11 subtract 5 from both sides, 5-5 cancels out and 11 - 5 is 6
-5 -5
r = 6
+ 2 +2
5 + r = 11 subtract 5 from both sides, 5-5 cancels out and 11 - 5 is 6
-5 -5
r = 6