-15=7.5c

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Solution for -15=7.5c equation: 



-15=7.5c

We move all terms to the left:

-15-(7.5c)=0

We add all the numbers together, and all the variables

-(+7.5c)-15=0

We get rid of parentheses

-7.5c-15=0

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

-7.5c=15

c=15/-7.5

c=-2

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