x-0.10x=7830

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Solution for x-0.10x=7830 equation: 



x-0.10x=7830

We move all terms to the left:

x-0.10x-(7830)=0

We add all the numbers together, and all the variables

0.9x-7830=0

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

0.9x=7830

x=7830/0.9

x=8700

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