x+12+6x-20=143.5

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Solution for x+12+6x-20=143.5 equation: 



x+12+6x-20=143.5

We move all terms to the left:

x+12+6x-20-(143.5)=0

We add all the numbers together, and all the variables

7x-151.5=0

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

7x=151.5

x=151.5/7

x=21+3/4.6666666666667

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