(0.5x+3x)=3x+12-x

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Solution for (0.5x+3x)=3x+12-x equation: 



(0.5x+3x)=3x+12-x

We move all terms to the left:

(0.5x+3x)-(3x+12-x)=0

We add all the numbers together, and all the variables

(+3.5x)-(2x+12)=0

We get rid of parentheses

3.5x-2x-12=0

We add all the numbers together, and all the variables

1.5x-12=0

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

1.5x=12

x=12/1.5

x=8

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