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-18z+8=-2(9z-4)
We move all terms to the left:
-18z+8-(-2(9z-4))=0
We calculate terms in parentheses: -(-2(9z-4)), so:We get rid of parentheses
-2(9z-4)
We multiply parentheses
-18z+8
Back to the equation:
-(-18z+8)
-18z+18z-8+8=0
We add all the numbers together, and all the variables
=0
z=0/1
z=0
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