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3z/10-9=-4
We move all terms to the left:
3z/10-9-(-4)=0
We add all the numbers together, and all the variables
3z/10-5=0
We multiply all the terms by the denominator
3z-5*10=0
We add all the numbers together, and all the variables
3z-50=0
We move all terms containing z to the left, all other terms to the right
3z=50
z=50/3
z=16+2/3
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