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(.02x*x)-40x=2500
We move all terms to the left:
(.02x*x)-40x-(2500)=0
We add all the numbers together, and all the variables
(+.02x*x)-40x-2500=0
We add all the numbers together, and all the variables
-40x+(+.02x*x)-2500=0
We get rid of parentheses
-40x+.02x*x-2500=0
We move all terms containing x to the left, all other terms to the right
-40x+.02x*x=2500
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