n + (n + 2) + (n + 4) = 177
In order to find consecutive odd numbers, you simply need to add 2 to the unknown.
For example, if I had the number 1 and wanted to find the next odd number, I could add 2, and that would make the number 3.
Combine all of the numbers on the left side:
3n + 6 = 177
Subtract 6 from both sides:
3n = 171
Divide both sides by 3:
n = 57
The first odd number is 57.