9x-20=4x+25

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Solution for 9x-20=4x+25 equation: 



9x-20=4x+25

We move all terms to the left:

9x-20-(4x+25)=0

We get rid of parentheses

9x-4x-25-20=0

We add all the numbers together, and all the variables

5x-45=0

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

5x=45

x=45/5

x=9

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