1)Question : granny georgette and kiwi have a combined age of 77 if kiwi is 13 years less than twice granny georgette age how old is kiwi.
2x + 13 = 77
2x=77-13
2x=64
x=64
----- x=32 kiwis age
2
Granny is X yrs. old.
Kiwi is (2x-13) yrs. old.
x + (2x-13) = 77.
3x - 13 = 77, X = 30 yrs. old.
2x-13 = 2*30 - 13 = 47 yrs. old.