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11z-15=-7+11z-8
We move all terms to the left:
11z-15-(-7+11z-8)=0
We add all the numbers together, and all the variables
11z-(11z-15)-15=0
We get rid of parentheses
11z-11z+15-15=0
We add all the numbers together, and all the variables
=0
z=0/1
z=0
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