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z+3+6=-z
We move all terms to the left:
z+3+6-(-z)=0
We add all the numbers together, and all the variables
z-(-1z)+3+6=0
We add all the numbers together, and all the variables
z-(-1z)+9=0
We get rid of parentheses
z+1z+9=0
We add all the numbers together, and all the variables
2z+9=0
We move all terms containing z to the left, all other terms to the right
2z=-9
z=-9/2
z=-4+1/2
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