12x+3+13=-4x

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Solution for 12x+3+13=-4x equation: 



12x+3+13=-4x

We move all terms to the left:

12x+3+13-(-4x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

12x+4x+16=0

We add all the numbers together, and all the variables

16x+16=0

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

16x=-16

x=-16/16

x=-1

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