20=500-12x

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Solution for 20=500-12x equation: 



20=500-12x

We move all terms to the left:

20-(500-12x)=0

We add all the numbers together, and all the variables

-(-12x+500)+20=0

We get rid of parentheses

12x-500+20=0

We add all the numbers together, and all the variables

12x-480=0

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

12x=480

x=480/12

x=40

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