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11(z-3)=7(z+3)
We move all terms to the left:
11(z-3)-(7(z+3))=0
We multiply parentheses
11z-(7(z+3))-33=0
We calculate terms in parentheses: -(7(z+3)), so:We get rid of parentheses
7(z+3)
We multiply parentheses
7z+21
Back to the equation:
-(7z+21)
11z-7z-21-33=0
We add all the numbers together, and all the variables
4z-54=0
We move all terms containing z to the left, all other terms to the right
4z=54
z=54/4
z=13+1/2
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