3x+13=-4x-8

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Solution for 3x+13=-4x-8 equation: 



3x+13=-4x-8

We move all terms to the left:

3x+13-(-4x-8)=0

We get rid of parentheses

3x+4x+8+13=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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