x-0.1x=18

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Solution for x-0.1x=18 equation: 



x-0.1x=18

We move all terms to the left:

x-0.1x-(18)=0

We add all the numbers together, and all the variables

0.9x-18=0

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

0.9x=18

x=18/0.9

x=20

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