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10+9z=13+9z
We move all terms to the left:
10+9z-(13+9z)=0
We add all the numbers together, and all the variables
9z-(9z+13)+10=0
We get rid of parentheses
9z-9z-13+10=0
We add all the numbers together, and all the variables
-3!=0
There is no solution for this equation
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