12+3x=-4x-16

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Solution for 12+3x=-4x-16 equation: 



12+3x=-4x-16

We move all terms to the left:

12+3x-(-4x-16)=0

We get rid of parentheses

3x+4x+16+12=0

We add all the numbers together, and all the variables

7x+28=0

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

7x=-28

x=-28/7

x=-4

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