x+9=-3x-20

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Solution for x+9=-3x-20 equation: 



x+9=-3x-20

We move all terms to the left:

x+9-(-3x-20)=0

We get rid of parentheses

x+3x+20+9=0

We add all the numbers together, and all the variables

4x+29=0

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

4x=-29

x=-29/4

x=-7+1/4

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