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0.02x + 0.09(40000-x)=2,120
We simplify the equation to the form, which is simple to understand
0.02x + 0.09(40000-x)=2,120
Reorder the terms in parentheses
0.02x+(+3600-0.09x)=2,120
Remove unnecessary parentheses
+ 0.02x+3600-0.09x=+2,120
We move all terms containing x to the left and all other terms to the right.
+ 0.02x-0.09x=+2.12-3600
We simplify left and right side of the equation.
-0.07x=-3597.88
We divide both sides of the equation by -0.07 to get x.
x=51398.2857143
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