Question 777337
Orthodox method:

a = grand daughter's age

95 = a + 7a - 9
104 = 8a
104 / 8 = a
a = 13

b = grandmother's age

b = (7)(13) - 9
b = 82


My method: 
I want to explain but I feel sleepy now

1.) 95 + 9 = 104
2.) 104 / 8 = 13
3.) 13 = grand daughter's age
4.) 13 * 7 = 91
5.) 91 -9 = 82 = grandma's age