2z+9=-z

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Solution for 2z+9=-z equation: 



2z+9=-z

We move all terms to the left:

2z+9-(-z)=0

We add all the numbers together, and all the variables

2z-(-1z)+9=0

We get rid of parentheses

2z+1z+9=0

We add all the numbers together, and all the variables

3z+9=0

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

3z=-9

z=-9/3

z=-3

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