2f+3-4=-20

Solution for 2f+3-4=-20 equation:

Simplifying
2f + 3 + -4 = -20

Reorder the terms:
3 + -4 + 2f = -20

Combine like terms: 3 + -4 = -1
-1 + 2f = -20

Solving
-1 + 2f = -20

Solving for variable 'f'.

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

Add '1' to each side of the equation.
-1 + 1 + 2f = -20 + 1

Combine like terms: -1 + 1 = 0
0 + 2f = -20 + 1
2f = -20 + 1

Combine like terms: -20 + 1 = -19
2f = -19

Divide each side by '2'.
f = -9.5

Simplifying
f = -9.5