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12-0.28x=16.20
We move all terms to the left:
12-0.28x-(16.20)=0
We add all the numbers together, and all the variables
-0.28x+12-(16.2)=0
We add all the numbers together, and all the variables
-0.28x-4.2=0
We move all terms containing x to the left, all other terms to the right
-0.28x=4.2
x=4.2/-0.28
x=-15
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