2n+1+n=-4.2

Solution for 2n+1+n=-4.2 equation:

Simplifying
2n + 1 + n = -4.2

Reorder the terms:
1 + 2n + n = -4.2

Combine like terms: 2n + n = 3n
1 + 3n = -4.2

Solving
1 + 3n = -4.2

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + 3n = -4.2 + -1

Combine like terms: 1 + -1 = 0
0 + 3n = -4.2 + -1
3n = -4.2 + -1

Combine like terms: -4.2 + -1 = -5.2
3n = -5.2

Divide each side by '3'.
n = -1.733333333

Simplifying
n = -1.733333333