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0.14x + 0.07(4000-x)=357
We simplify the equation to the form, which is simple to understand
0.14x + 0.07(4000-x)=357
Reorder the terms in parentheses
0.14x+(+280-0.07x)=357
Remove unnecessary parentheses
+ 0.14x+280-0.07x=+357
We move all terms containing x to the left and all other terms to the right.
+ 0.14x-0.07x=+357-280
We simplify left and right side of the equation.
+ 0.07x=+77
We divide both sides of the equation by 0.07 to get x.
x=1100
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