(0.9x-1.3=-3.1)

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Solution for (0.9x-1.3=-3.1) equation: 



(0.9x-1.3=-3.1)

We move all terms to the left:

(0.9x-1.3-(-3.1))=0



We calculate terms in parentheses: +(0.9x-1.3-(-3.1)), so:

0.9x-1.3-(-3.1)

We add all the numbers together, and all the variables

0.9x+1.8

Back to the equation:

+(0.9x+1.8)



We get rid of parentheses

0.9x+1.8=0

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

0.9x=-1.8

x=-1.8/0.9

x=-2

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