n+n+1+n+2=57

Solution for n+n+1+n+2=57 equation:

Simplifying
n + n + 1 + n + 2 = 57

Reorder the terms:
1 + 2 + n + n + n = 57

Combine like terms: 1 + 2 = 3
3 + n + n + n = 57

Combine like terms: n + n = 2n
3 + 2n + n = 57

Combine like terms: 2n + n = 3n
3 + 3n = 57

Solving
3 + 3n = 57

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-3' to each side of the equation.
3 + -3 + 3n = 57 + -3

Combine like terms: 3 + -3 = 0
0 + 3n = 57 + -3
3n = 57 + -3

Combine like terms: 57 + -3 = 54
3n = 54

Divide each side by '3'.
n = 18

Simplifying
n = 18