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(7000-x)/5000=0.4
We move all terms to the left:
(7000-x)/5000-(0.4)=0
We add all the numbers together, and all the variables
(-1x+7000)/5000-(0.4)=0
We add all the numbers together, and all the variables
(-1x+7000)/5000-0.4=0
We multiply all the terms by the denominator
(-1x+7000)-(0.4)*5000=0
We add all the numbers together, and all the variables
(-1x+7000)-2000=0
We get rid of parentheses
-1x+7000-2000=0
We add all the numbers together, and all the variables
-1x+5000=0
We move all terms containing x to the left, all other terms to the right
-x=-5000
x=-5000/-1
x=+5000
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