-3-12=5+c

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Solution for -3-12=5+c equation: 


Simplifying
-3 + -12 = 5 + c

Combine like terms: -3 + -12 = -15
-15 = 5 + c

Solving
-15 = 5 + 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.
-15 + -1c = 5 + c + -1c

Combine like terms: c + -1c = 0
-15 + -1c = 5 + 0
-15 + -1c = 5

Add '15' to each side of the equation.
-15 + 15 + -1c = 5 + 15

Combine like terms: -15 + 15 = 0
0 + -1c = 5 + 15
-1c = 5 + 15

Combine like terms: 5 + 15 = 20
-1c = 20

Divide each side by '-1'.
c = -20

Simplifying
c = -20

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