9.9=2.1-1.3x

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Solution for 9.9=2.1-1.3x equation: 



9.9=2.1-1.3x

We move all terms to the left:

9.9-(2.1-1.3x)=0

We add all the numbers together, and all the variables

-(-1.3x+2.1)+9.9=0

We get rid of parentheses

1.3x-2.1+9.9=0

We add all the numbers together, and all the variables

1.3x+7.8=0

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

1.3x=-7.8

x=-7.8/1.3

x=-6+-8.8817841970013E-16/1.3

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