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12(z+2)-4(z-4)=3(z-2)+4(z-2)
We move all terms to the left:
12(z+2)-4(z-4)-(3(z-2)+4(z-2))=0
We multiply parentheses
12z-4z-(3(z-2)+4(z-2))+24+16=0
We calculate terms in parentheses: -(3(z-2)+4(z-2)), so:We add all the numbers together, and all the variables
3(z-2)+4(z-2)
We multiply parentheses
3z+4z-6-8
We add all the numbers together, and all the variables
7z-14
Back to the equation:
-(7z-14)
8z-(7z-14)+40=0
We get rid of parentheses
8z-7z+14+40=0
We add all the numbers together, and all the variables
z+54=0
We move all terms containing z to the left, all other terms to the right
z=-54
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