20x-9=90

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Solution for 20x-9=90 equation: 



20x-9=90

We move all terms to the left:

20x-9-(90)=0

We add all the numbers together, and all the variables

20x-99=0

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

20x=99

x=99/20

x=4+19/20

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