Sipho is 4 older than his sister, their combined age is 18. How old is sipho
sister ---- x
Sipho ---- x+4
" their combined age is 18" , what does "combined" insinuate ?
Form the resulting equation and solve for x
s + s + 4 = 18
2s = 14
s = 7 (sister's age)
To find Sipho's age, we can represent his sister's age as x. According to the information given, Sipho is 4 years older than his sister, so his age can be represented as (x + 4).
We also know that their combined age is 18. So, we can set up an equation: x + (x + 4) = 18.
Let’s solve for x:
Combining like terms, we get: 2x + 4 = 18.
Subtracting 4 from both sides of the equation, we get: 2x = 14.
Dividing both sides by 2, we get: x = 7.
This means Sipho's sister is 7 years old. And since Sipho is 4 years older, Sipho's age is 7 + 4 = 11 years old.
Therefore, Sipho is 11 years old.