Question 624288
Let Gugu's age be n + 7

Let her sister's age be n

Therefore:

n + n + 7 = 33

Combine like terms:

n + n = 2n

2n + 7 = 33

Subtract 7 from each side of the equation

2n + 7 - 7 = 33 - 7

Combine like terms:

7 - 7 = 0

33 - 7 = 26

2n = 26

Divide each side by 2

2n/2 = 26/2

n = 13

n + 7 = 13 + 7 = 20


Gugu is 20 years old.


Her sister is 13 years old.



obuong3@aol.com