0.4x+0.9(15-x)=8.5

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Solution for 0.4x+0.9(15-x)=8.5 equation: 



0.4x+0.9(15-x)=8.5

We move all terms to the left:

0.4x+0.9(15-x)-(8.5)=0

We add all the numbers together, and all the variables

0.4x+0.9(-1x+15)-(8.5)=0

We add all the numbers together, and all the variables

0.4x+0.9(-1x+15)-8.5=0

We multiply parentheses

0.4x-0.9x+13.5-8.5=0

We add all the numbers together, and all the variables

-0.5x+5=0

We move all terms containing x to the left, all other terms to the right

-0.5x=-5

x=-5/-0.5

x=+10

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