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3z/10-7=3
We move all terms to the left:
3z/10-7-(3)=0
We add all the numbers together, and all the variables
3z/10-10=0
We multiply all the terms by the denominator
3z-10*10=0
We add all the numbers together, and all the variables
3z-100=0
We move all terms containing z to the left, all other terms to the right
3z=100
z=100/3
z=33+1/3
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