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(3z/10)-7=-5
We move all terms to the left:
(3z/10)-7-(-5)=0
We add all the numbers together, and all the variables
(+3z/10)-7-(-5)=0
We add all the numbers together, and all the variables
(+3z/10)-2=0
We get rid of parentheses
3z/10-2=0
We multiply all the terms by the denominator
3z-2*10=0
We add all the numbers together, and all the variables
3z-20=0
We move all terms containing z to the left, all other terms to the right
3z=20
z=20/3
z=6+2/3
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