3=1-2f

Solution for 3=1-2f equation:

Simplifying
3 = 1 + -2f

Solving
3 = 1 + -2f

Solving for variable 'f'.

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

Add '2f' to each side of the equation.
3 + 2f = 1 + -2f + 2f

Combine like terms: -2f + 2f = 0
3 + 2f = 1 + 0
3 + 2f = 1

Add '-3' to each side of the equation.
3 + -3 + 2f = 1 + -3

Combine like terms: 3 + -3 = 0
0 + 2f = 1 + -3
2f = 1 + -3

Combine like terms: 1 + -3 = -2
2f = -2

Divide each side by '2'.
f = -1

Simplifying
f = -1