.50x+0.20(9-x)=3

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Solution for .50x+0.20(9-x)=3 equation: 



.50x+0.20(9-x)=3

We move all terms to the left:

.50x+0.20(9-x)-(3)=0

We add all the numbers together, and all the variables

.50x+0.20(-1x+9)-3=0

We multiply parentheses

.50x-0.2x+1.8-3=0

We add all the numbers together, and all the variables

0.3x-1.2=0

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

0.3x=1.2

x=1.2/0.3

x=4

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