Ulani has two sisters. Ulanis older sister is twice her age plus one. Her younger sister is 3 years less than ulanis age. What is ulsnis age if their sum of she's equals 26?
If their ages are
younger sister: x
Ulani: y
elder sister: z
then we have
z = 2y+1
x = y-3
x+y+z = 26
(y-3) + y + (2y+1) = 26
4y-2 = 26
y = 7
To find Ulani's age, we need to set up an equation using the information given.
Let's assume Ulani's age is represented by 'U'.
According to the information given:
- Ulani's older sister is twice her age plus one:
So her older sister's age can be represented as 2U + 1.
- Ulani's younger sister is 3 years less than Ulani's age:
So her younger sister's age can be represented as U - 3.
The sum of their ages is 26:
So, U + (2U + 1) + (U - 3) = 26.
Now we can solve this equation to find Ulani's age.
Combining like terms, we get:
4U - 2 = 26.
Adding 2 to both sides of the equation gives:
4U = 28.
Dividing both sides by 4 gives:
U = 7.
Therefore, Ulani is 7 years old.