3x+7=-9-X

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Solution for 3x+7=-9-X equation: 



3x+7=-9-x

We move all terms to the left:

3x+7-(-9-x)=0

We add all the numbers together, and all the variables

3x-(-1x-9)+7=0

We get rid of parentheses

3x+1x+9+7=0

We add all the numbers together, and all the variables

4x+16=0

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

4x=-16

x=-16/4

x=-4

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