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0.4x + 0.8(35-x)=25.6
We simplify the equation to the form, which is simple to understand
0.4x + 0.8(35-x)=25.6
Reorder the terms in parentheses
0.4x+(+28-0.8x)=25.6
Remove unnecessary parentheses
+ 0.4x+28-0.8x=+25.6
We move all terms containing x to the left and all other terms to the right.
+ 0.4x-0.8x=+25.6-28
We simplify left and right side of the equation.
-0.4x=-2.4
We divide both sides of the equation by -0.4 to get x.
x=6
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