15=3+-2c

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Solution for 15=3+-2c equation: 



15=3+-2c

We move all terms to the left:

15-(3+-2c)=0

We add all the numbers together, and all the variables

-(-2c)+15=0

We get rid of parentheses

2c+15=0

We move all terms containing c to the left, all other terms to the right

2c=-15

c=-15/2

c=-7+1/2

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