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-7(-4+-4z)+2=78+4z
We move all terms to the left:
-7(-4+-4z)+2-(78+4z)=0
We add all the numbers together, and all the variables
-7(-4z)-(4z+78)+2=0
We multiply parentheses
28z-(4z+78)+2=0
We get rid of parentheses
28z-4z-78+2=0
We add all the numbers together, and all the variables
24z-76=0
We move all terms containing z to the left, all other terms to the right
24z=76
z=76/24
z=3+1/6
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