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z+8=-10-2z
We move all terms to the left:
z+8-(-10-2z)=0
We add all the numbers together, and all the variables
z-(-2z-10)+8=0
We get rid of parentheses
z+2z+10+8=0
We add all the numbers together, and all the variables
3z+18=0
We move all terms containing z to the left, all other terms to the right
3z=-18
z=-18/3
z=-6
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