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66-2(z+1)=6z+4z+4
We move all terms to the left:
66-2(z+1)-(6z+4z+4)=0
We add all the numbers together, and all the variables
-2(z+1)-(10z+4)+66=0
We multiply parentheses
-2z-(10z+4)-2+66=0
We get rid of parentheses
-2z-10z-4-2+66=0
We add all the numbers together, and all the variables
-12z+60=0
We move all terms containing z to the left, all other terms to the right
-12z=-60
z=-60/-12
z=+5
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