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13z=31.75+4
We move all terms to the left:
13z-(31.75+4)=0
We add all the numbers together, and all the variables
13z-(35.75)=0
We add all the numbers together, and all the variables
13z-35.75=0
We move all terms containing z to the left, all other terms to the right
13z=35.75
z=35.75/13
z=2+5.57142857143/7.42857142857
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