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3z=1.5+2.1
We move all terms to the left:
3z-(1.5+2.1)=0
We add all the numbers together, and all the variables
3z-(3.6)=0
We add all the numbers together, and all the variables
3z-3.6=0
We move all terms containing z to the left, all other terms to the right
3z=3.6
z=3.6/3
z=1+0.6/3
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