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3(2z-4)=-5(z+4)
We move all terms to the left:
3(2z-4)-(-5(z+4))=0
We multiply parentheses
6z-(-5(z+4))-12=0
We calculate terms in parentheses: -(-5(z+4)), so:We get rid of parentheses
-5(z+4)
We multiply parentheses
-5z-20
Back to the equation:
-(-5z-20)
6z+5z+20-12=0
We add all the numbers together, and all the variables
11z+8=0
We move all terms containing z to the left, all other terms to the right
11z=-8
z=-8/11
z=-8/11
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