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4.5=k/2+1.8
We move all terms to the left:
4.5-(k/2+1.8)=0
We get rid of parentheses
-k/2-1.8+4.5=0
We multiply all the terms by the denominator
-k-(1.8)*2+(4.5)*2=0
We add all the numbers together, and all the variables
-1k+5.4=0
We move all terms containing k to the left, all other terms to the right
-k=-5.4
k=-5.4/-1
k=5+0.4/1
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