1=0.1x-0.9x-7

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Solution for 1=0.1x-0.9x-7 equation: 



1=0.1x-0.9x-7

We move all terms to the left:

1-(0.1x-0.9x-7)=0

We add all the numbers together, and all the variables

-(-0.8x-7)+1=0

We get rid of parentheses

0.8x+7+1=0

We add all the numbers together, and all the variables

0.8x+8=0

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

0.8x=-8

x=-8/0.8

x=-10

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