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(4z/10)+8=-1
We move all terms to the left:
(4z/10)+8-(-1)=0
We add all the numbers together, and all the variables
(+4z/10)+8-(-1)=0
We add all the numbers together, and all the variables
(+4z/10)+9=0
We get rid of parentheses
4z/10+9=0
We multiply all the terms by the denominator
4z+9*10=0
We add all the numbers together, and all the variables
4z+90=0
We move all terms containing z to the left, all other terms to the right
4z=-90
z=-90/4
z=-22+1/2
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