0.3(r+20)=0.1(-2r-4)

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Solution for 0.3(r+20)=0.1(-2r-4) equation: 



0.3(r+20)=0.1(-2r-4)

We move all terms to the left:

0.3(r+20)-(0.1(-2r-4))=0

We multiply parentheses

0.3r-(0.1(-2r-4))+6=0



We calculate terms in parentheses: -(0.1(-2r-4)), so:

0.1(-2r-4)

We multiply parentheses

-0.2r-0.4

Back to the equation:

-(-0.2r-0.4)



We get rid of parentheses

0.3r+0.2r+0.4+6=0

We add all the numbers together, and all the variables

0.5r+6.4=0

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

0.5r=-6.4

r=-6.4/0.5

r=-12+0.4/0.5

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