x-0.90x=78

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Solution for x-0.90x=78 equation: 



x-0.90x=78

We move all terms to the left:

x-0.90x-(78)=0

We add all the numbers together, and all the variables

0.1x-78=0

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

0.1x=78

x=78/0.1

x=780

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