berts age plus twice ernies age is 30. three times berts age plus 8 times ernies age is 108 how old are bert and ernie.

Answer 1

b + 2 e = 30 so b = (30 - 2 e)

3 b + 8 e = 108
so
3 (30-2e) + 8 e = 108
90 - 6 e +8 e = 108
2 e = 18
e = 9
then b = 30 - 18 = 12

Answer 2

im confused