45-3n=3+n

Solution for 45-3n=3+n equation:

Simplifying
45 + -3n = 3 + n

Solving
45 + -3n = 3 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
45 + -3n + -1n = 3 + n + -1n

Combine like terms: -3n + -1n = -4n
45 + -4n = 3 + n + -1n

Combine like terms: n + -1n = 0
45 + -4n = 3 + 0
45 + -4n = 3

Add '-45' to each side of the equation.
45 + -45 + -4n = 3 + -45

Combine like terms: 45 + -45 = 0
0 + -4n = 3 + -45
-4n = 3 + -45

Combine like terms: 3 + -45 = -42
-4n = -42

Divide each side by '-4'.
n = 10.5

Simplifying
n = 10.5