Christian is ten more than twice his nephew’s age. If Christian is 28 years old, how old is his nephew?
Let's use algebra to solve this problem.
Let's represent Christian's nephew's age as x.
According to the problem, Christian is ten more than twice his nephew's age, so we can write this as: 2x + 10 = 28
Now, let's solve for x.
Subtracting 10 from both sides of the equation, we get: 2x = 18
Dividing both sides of the equation by 2, we get: x = 9
Therefore, Christian's nephew is 9 years old.