10c+2c-10c+2c-2c-1=19

Solution for 10c+2c-10c+2c-2c-1=19 equation:

Simplifying
10c + 2c + -10c + 2c + -2c + -1 = 19

Reorder the terms:
-1 + 10c + 2c + -10c + 2c + -2c = 19

Combine like terms: 10c + 2c = 12c
-1 + 12c + -10c + 2c + -2c = 19

Combine like terms: 12c + -10c = 2c
-1 + 2c + 2c + -2c = 19

Combine like terms: 2c + 2c = 4c
-1 + 4c + -2c = 19

Combine like terms: 4c + -2c = 2c
-1 + 2c = 19

Solving
-1 + 2c = 19

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 1 + 2c = 19 + 1

Combine like terms: -1 + 1 = 0
0 + 2c = 19 + 1
2c = 19 + 1

Combine like terms: 19 + 1 = 20
2c = 20

Divide each side by '2'.
c = 10

Simplifying
c = 10