-0.4(-8.1k+9)=-9(0.1-0.41k)

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Solution for -0.4(-8.1k+9)=-9(0.1-0.41k) equation: 



-0.4(-8.1k+9)=-9(0.1-0.41k)

We move all terms to the left:

-0.4(-8.1k+9)-(-9(0.1-0.41k))=0

We add all the numbers together, and all the variables

-0.4(-8.1k+9)-(-9(-0.41k+0.1))=0

We multiply parentheses

3.2k-(-9(-0.41k+0.1))-3.6=0



We calculate terms in parentheses: -(-9(-0.41k+0.1)), so:

-9(-0.41k+0.1)

We multiply parentheses

-0k-0.9

We add all the numbers together, and all the variables

-1k-0.9

Back to the equation:

-(-1k-0.9)



We get rid of parentheses

3.2k+1k+0.9-3.6=0

We add all the numbers together, and all the variables

4.2k-2.7=0

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

4.2k=2.7

k=2.7/4.2

k=1/1.5555555555556

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