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35.4=z*3.1
We move all terms to the left:
35.4-(z*3.1)=0
We add all the numbers together, and all the variables
-(+z*3.1)+35.4=0
We get rid of parentheses
-z*3.1+35.4=0
Wy multiply elements
-3.1z+35.4=0
We move all terms containing z to the left, all other terms to the right
-3.1z=-35.4
z=-35.4/-3.1
z=11+1/2.3846153846154
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