x+0.3x=12

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Solution for x+0.3x=12 equation: 



x+0.3x=12

We move all terms to the left:

x+0.3x-(12)=0

We add all the numbers together, and all the variables

1.3x-12=0

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

1.3x=12

x=12/1.3

x=9+0.3/1.3

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