Bisi and fibie ages add up to 29 seven years ago bisi was twice as old as fibie find their present ages

B's current age ---- x

F's current age ---- 29-x

7 years ago:
B's age = x-7
F's age = 29-x - 7 = 22-x

x-7 = 2(22-x)

solve for x , and sub into my definitions

Looks like they used the same textbook back in 2011

https://www.jiskha.com/display.cgi?id=1321919895

To find Bisi and Fibie's present ages, let's first set up some equations based on the information given:

Let Bisi's age be represented by 'B',
Let Fibie's age be represented by 'F'.

According to the statement, "Bisi and Fibie ages add up to 29 seven years ago," we can write the equation:
B - 7 + F - 7 = 29

Simplifying this equation, we get:
B + F - 14 = 29

Now, let's use the second piece of information provided: "Bisi was twice as old as Fibie seven years ago."
This means that (F - 7) * 2 = (B - 7).

Let's simplify this equation:
2F - 14 = B - 7

Next, let's solve the system of equations formed by the two equations we derived:
B + F - 14 = 29
2F - 14 = B - 7

We can start by solving the second equation for B:
B = 2F - 7 + 14
B = 2F + 7 (Equation 1)

Now, substitute Equation 1 into the first equation:
2F + 7 + F - 14 = 29
3F - 7 = 29 + 14
3F - 7 = 43

Add 7 to both sides of the equation:
3F = 50

Divide both sides of the equation by 3:
F = 50/3

Since we can't have fractional ages, we will round down to the nearest whole number:
F ≈ 16

Now we can substitute the value of F back into Equation 1 to find B:
B = 2F + 7
B = 2(16) + 7
B = 39

Therefore, Bisi's present age is 39, and Fibie's present age is 16.