2.8c-4.2-1.6c=-10.2

Solution for 2.8c-4.2-1.6c=-10.2 equation:

Simplifying
2.8c + -4.2 + -1.6c = -10.2

Reorder the terms:
-4.2 + 2.8c + -1.6c = -10.2

Combine like terms: 2.8c + -1.6c = 1.2c
-4.2 + 1.2c = -10.2

Solving
-4.2 + 1.2c = -10.2

Solving for variable 'c'.

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

Add '4.2' to each side of the equation.
-4.2 + 4.2 + 1.2c = -10.2 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + 1.2c = -10.2 + 4.2
1.2c = -10.2 + 4.2

Combine like terms: -10.2 + 4.2 = -6
1.2c = -6

Divide each side by '1.2'.
c = -5

Simplifying
c = -5