The numbers are 14, 18, and 26.
Step-by-step explanation:
1. Model the situation.
(x) + (x + 4) + (x + 12) = 58
2. Combine like terms.
3x + 16 = 58
3. Subtract 16 from both sides.
3x = 42
4. Divide 3 from both sides.
x = 14
Now, replace x with a 14.
14 + (14 + 4) + (14 + 12) = 58
Solve.
14 + 18 + 26 = 58
58 = 58
The numbers are 14, 18, and 26.