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1.9z-19=1.9
We move all terms to the left:
1.9z-19-(1.9)=0
We add all the numbers together, and all the variables
1.9z-20.9=0
We move all terms containing z to the left, all other terms to the right
1.9z=20.9
z=20.9/1.9
z=11
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