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20(z+30)=8-(-30z-40)
We move all terms to the left:
20(z+30)-(8-(-30z-40))=0
We multiply parentheses
20z-(8-(-30z-40))+600=0
We calculate terms in parentheses: -(8-(-30z-40)), so:We get rid of parentheses
8-(-30z-40)
determiningTheFunctionDomain -(-30z-40)+8
We get rid of parentheses
30z+40+8
We add all the numbers together, and all the variables
30z+48
Back to the equation:
-(30z+48)
20z-30z-48+600=0
We add all the numbers together, and all the variables
-10z+552=0
We move all terms containing z to the left, all other terms to the right
-10z=-552
z=-552/-10
z=55+1/5
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