0.06x+0.09(100-x)=7.8

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Solution for 0.06x+0.09(100-x)=7.8 equation:


0.06x + 0.09(100-x)=7.8

We simplify the equation to the form, which is simple to understand 
0.06x + 0.09(100-x)=7.8

Reorder the terms in parentheses
0.06x+(+9-0.09x)=7.8

Remove unnecessary parentheses
 + 0.06x+9-0.09x=+7.8

We move all terms containing x to the left and all other terms to the right. 
 + 0.06x-0.09x=+7.8-9

We simplify left and right side of the equation. 
-0.03x=-1.2

We divide both sides of the equation by -0.03 to get x. 
x=40

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