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1.4z=4.2
We move all terms to the left:
1.4z-(4.2)=0
We add all the numbers together, and all the variables
1.4z-4.2=0
We move all terms containing z to the left, all other terms to the right
1.4z=4.2
z=4.2/1.4
z=3+8.8817841970013E-16/1.4
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