-1=f+(-19)

Solution for -1=f+(-19) equation:

Simplifying
-1 = f + (-19)
-1 = f + -19

Reorder the terms:
-1 = -19 + f

Solving
-1 = -19 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
-1 + -1f = -19 + f + -1f

Combine like terms: f + -1f = 0
-1 + -1f = -19 + 0
-1 + -1f = -19

Add '1' to each side of the equation.
-1 + 1 + -1f = -19 + 1

Combine like terms: -1 + 1 = 0
0 + -1f = -19 + 1
-1f = -19 + 1

Combine like terms: -19 + 1 = -18
-1f = -18

Divide each side by '-1'.
f = 18

Simplifying
f = 18