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4xx2.5=14x-21
We move all terms to the left:
4xx2.5-(14x-21)=0
We get rid of parentheses
4xx2.5-14x+21=0
We add all the numbers together, and all the variables
-14x+4xx2.5+21=0
We move all terms containing x to the left, all other terms to the right
-14x+4xx2.5=-21
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