9x-20-4x=40

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Solution for 9x-20-4x=40 equation: 



9x-20-4x=40

We move all terms to the left:

9x-20-4x-(40)=0

We add all the numbers together, and all the variables

5x-60=0

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

5x=60

x=60/5

x=12

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