Kelly is nine years older than her sister. Kelly's age is one more than twice her sister's age. What is Kelly's age?
how do I solve this problem?
K = S + 9
K = 2S + 1
s + 9 = 2S + 1
-S -s
9 = S + 1
8 + S
K = 17
thanks
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John is as many years older than his brother as he is younger sister if you know the age of his brother and is sister, how can you find John's age?
To solve this problem, you can set up a system of equations based on the given information.
Let's assume Kelly's sister's age is x.
According to the problem, Kelly is nine years older than her sister, so Kelly's age would be x + 9.
The problem also states that Kelly's age is one more than twice her sister's age, so we can write the equation as:
x + 9 = 2x + 1
Now, we can solve this equation to find the value of x, which represents Kelly's sister's age.
Subtract x from both sides of the equation:
9 = x + 1
Subtract 1 from both sides of the equation:
8 = x
Therefore, Kelly's sister's age (x) is 8 years old.
Finally, to find Kelly's age, we can substitute the value of x back into our equation for Kelly's age. Kelly's age = x + 9:
Kelly's age = 8 + 9
Kelly's age = 17 years old.
So, Kelly is 17 years old.