128=c+89

Solution for 128=c+89 equation:

Simplifying
128 = c + 89

Reorder the terms:
128 = 89 + c

Solving
128 = 89 + 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.
128 + -1c = 89 + c + -1c

Combine like terms: c + -1c = 0
128 + -1c = 89 + 0
128 + -1c = 89

Add '-128' to each side of the equation.
128 + -128 + -1c = 89 + -128

Combine like terms: 128 + -128 = 0
0 + -1c = 89 + -128
-1c = 89 + -128

Combine like terms: 89 + -128 = -39
-1c = -39

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

Simplifying
c = 39