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-17.9=2.2z-4.7
We move all terms to the left:
-17.9-(2.2z-4.7)=0
We get rid of parentheses
-2.2z+4.7-17.9=0
We add all the numbers together, and all the variables
-2.2z-13.2=0
We move all terms containing z to the left, all other terms to the right
-2.2z=13.2
z=13.2/-2.2
z=-5+1/1
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