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3z/10=4
We move all terms to the left:
3z/10-(4)=0
We multiply all the terms by the denominator
3z-4*10=0
We add all the numbers together, and all the variables
3z-40=0
We move all terms containing z to the left, all other terms to the right
3z=40
z=40/3
z=13+1/3
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