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309000=x-0.4x-705000
We move all terms to the left:
309000-(x-0.4x-705000)=0
We add all the numbers together, and all the variables
-(0.6x-705000)+309000=0
We get rid of parentheses
-0.6x+705000+309000=0
We add all the numbers together, and all the variables
-0.6x+1014000=0
We move all terms containing x to the left, all other terms to the right
-0.6x=-1014000
x=-1014000/-0.6
x=+1690000
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