28-c=13

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Solution for 28-c=13 equation: 


Simplifying
28 + -1c = 13

Solving
28 + -1c = 13

Solving for variable 'c'.

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

Add '-28' to each side of the equation.
28 + -28 + -1c = 13 + -28

Combine like terms: 28 + -28 = 0
0 + -1c = 13 + -28
-1c = 13 + -28

Combine like terms: 13 + -28 = -15
-1c = -15

Divide each side by '-1'.
c = 15

Simplifying
c = 15

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