Question 843440
B + F + 29
B = 29 - F
7 years ago
B - 7 = 2(F - 7)
B - 7 = 2F - 14
Replace B with 29 - F
29 - F - 7 = 2F - 14
Collect like terms:
-3F = -36
  F = 12
Bisi = 17 yrs old and Fibie = 12 yrs old
Hope this helps.
:-)