9x-20=x+20

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Solution for 9x-20=x+20 equation: 



9x-20=x+20

We move all terms to the left:

9x-20-(x+20)=0

We get rid of parentheses

9x-x-20-20=0

We add all the numbers together, and all the variables

8x-40=0

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

8x=40

x=40/8

x=5

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