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8-5z=2(z+3)
We move all terms to the left:
8-5z-(2(z+3))=0
We calculate terms in parentheses: -(2(z+3)), so:We get rid of parentheses
2(z+3)
We multiply parentheses
2z+6
Back to the equation:
-(2z+6)
-5z-2z-6+8=0
We add all the numbers together, and all the variables
-7z+2=0
We move all terms containing z to the left, all other terms to the right
-7z=-2
z=-2/-7
z=2/7
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