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4(7-z)/2=-z
We move all terms to the left:
4(7-z)/2-(-z)=0
We add all the numbers together, and all the variables
4(-1z+7)/2-(-1z)=0
We get rid of parentheses
4(-1z+7)/2+1z=0
We multiply all the terms by the denominator
4(-1z+7)+1z*2=0
We multiply parentheses
-4z+1z*2+28=0
Wy multiply elements
-4z+2z+28=0
We add all the numbers together, and all the variables
-2z+28=0
We move all terms containing z to the left, all other terms to the right
-2z=-28
z=-28/-2
z=+14
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