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3z/10+3=-1
We move all terms to the left:
3z/10+3-(-1)=0
We add all the numbers together, and all the variables
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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