3=5-2n

Solution for 3=5-2n equation:

Simplifying
3 = 5 + -2n

Solving
3 = 5 + -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 = 5 + -2n + 2n

Combine like terms: -2n + 2n = 0
3 + 2n = 5 + 0
3 + 2n = 5

Add '-3' to each side of the equation.
3 + -3 + 2n = 5 + -3

Combine like terms: 3 + -3 = 0
0 + 2n = 5 + -3
2n = 5 + -3

Combine like terms: 5 + -3 = 2
2n = 2

Divide each side by '2'.
n = 1

Simplifying
n = 1