-19-20=c

Solution for -19-20=c equation:

Simplifying
-19 + -20 = c

Combine like terms: -19 + -20 = -39
-39 = c

Solving
-39 = c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
-39 + -1c = c + -1c

Combine like terms: c + -1c = 0
-39 + -1c = 0

Add '39' to each side of the equation.
-39 + 39 + -1c = 0 + 39

Combine like terms: -39 + 39 = 0
0 + -1c = 0 + 39
-1c = 0 + 39

Combine like terms: 0 + 39 = 39
-1c = 39

Divide each side by '-1'.
c = -39

Simplifying
c = -39