Justin is 10 years less than half his father's age. If Justin is 12 years old, how old is his father?

12 + 10 = f/2

22 = f/2
f = 44

To calculate Justin's father's age, we need to follow these steps:

Step 1: Set up an equation to represent the given information. Let's call Justin's father's age "F."
According to the problem, Justin is 10 years less than half his father's age, so we can write the equation as:

Justin's age = (1/2) * Justin's father's age - 10

Step 2: Substitute the given values into the equation. We know that Justin is 12 years old, so we can substitute that value into the equation:

12 = (1/2) * F - 10

Step 3: Solve the equation for F. Start by moving -10 to the other side of the equation (adding 10 to both sides):

12 + 10 = (1/2) * F
22 = (1/2) * F

Next, we need to isolate F, so multiply both sides by 2 to cancel out the 1/2 coefficient:

2 * 22 = 2 * (1/2) * F
44 = F

Therefore, Justin's father is 44 years old.