3=2n+42

Solution for 3=2n+42 equation:

Simplifying
3 = 2n + 42

Reorder the terms:
3 = 42 + 2n

Solving
3 = 42 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
3 + -2n = 42 + 2n + -2n

Combine like terms: 2n + -2n = 0
3 + -2n = 42 + 0
3 + -2n = 42

Add '-3' to each side of the equation.
3 + -3 + -2n = 42 + -3

Combine like terms: 3 + -3 = 0
0 + -2n = 42 + -3
-2n = 42 + -3

Combine like terms: 42 + -3 = 39
-2n = 39

Divide each side by '-2'.
n = -19.5

Simplifying
n = -19.5