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3.5(5.1-z)=18.9
We move all terms to the left:
3.5(5.1-z)-(18.9)=0
We add all the numbers together, and all the variables
3.5(-1z+5.1)-(18.9)=0
We add all the numbers together, and all the variables
3.5(-1z+5.1)-18.9=0
We multiply parentheses
-3.5z+17.85-18.9=0
We add all the numbers together, and all the variables
-3.5z-1.05=0
We move all terms containing z to the left, all other terms to the right
-3.5z=1.05
z=1.05/-3.5
z=-1/3.3333333333333
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