.4(r-2)=0.15(r-4)

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Solution for .4(r-2)=0.15(r-4) equation: 



.4(r-2)=0.15(r-4)

We move all terms to the left:

.4(r-2)-(0.15(r-4))=0

We multiply parentheses

0.4r-(0.15(r-4))-0.8=0



We calculate terms in parentheses: -(0.15(r-4)), so:

0.15(r-4)

We multiply parentheses

0.15r-0.6

Back to the equation:

-(0.15r-0.6)



We get rid of parentheses

0.4r-0.15r+0.6-0.8=0

We add all the numbers together, and all the variables

0.25r-0.2=0

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

0.25r=0.2

r=0.2/0.25

r=0.2/0.25

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