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-2(4z-3)=-50
We move all terms to the left:
-2(4z-3)-(-50)=0
We add all the numbers together, and all the variables
-2(4z-3)+50=0
We multiply parentheses
-8z+6+50=0
We add all the numbers together, and all the variables
-8z+56=0
We move all terms containing z to the left, all other terms to the right
-8z=-56
z=-56/-8
z=+7
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