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x-(0.3x)=300000
We move all terms to the left:
x-(0.3x)-(300000)=0
We add all the numbers together, and all the variables
x-(+0.3x)-300000=0
We get rid of parentheses
x-0.3x-300000=0
We add all the numbers together, and all the variables
0.7x-300000=0
We move all terms containing x to the left, all other terms to the right
0.7x=300000
x=300000/0.7
x=428571+0.30000000004657/0.7
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