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0.14x+0.1(6000-x)=680
We move all terms to the left:
0.14x+0.1(6000-x)-(680)=0
We add all the numbers together, and all the variables
0.14x+0.1(-1x+6000)-680=0
We multiply parentheses
0.14x-0.1x+600-680=0
We add all the numbers together, and all the variables
0.04x-80=0
We move all terms containing x to the left, all other terms to the right
0.04x=80
x=80/0.04
x=2000
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