12=-3x-45

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Solution for 12=-3x-45 equation: 



12=-3x-45

We move all terms to the left:

12-(-3x-45)=0

We get rid of parentheses

3x+45+12=0

We add all the numbers together, and all the variables

3x+57=0

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

3x=-57

x=-57/3

x=-19

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