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0.04x + 0.20 (80-x)=0.15 (80)
We simplify the equation to the form, which is simple to understand
0.04x + 0.20(80-x)=0.15(80)
Reorder the terms in parentheses
0.04x+(+16-0.2x)=0.15*(80)
Remove unnecessary parentheses
+ 0.04x+16-0.2x=0.15+*(+80+)
Reorder the terms in parentheses
0.04x+16-0.2x=+(+12)
Remove unnecessary parentheses
+ 0.04x+16-0.2x=+12
We move all terms containing x to the left and all other terms to the right.
+ 0.04x-0.2x=+12-16
We simplify left and right side of the equation.
-0.16x=-4
We divide both sides of the equation by -0.16 to get x.
x=25
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