0.4r-0.6=1.3r+1.2

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Solution for 0.4r-0.6=1.3r+1.2 equation: 



0.4r-0.6=1.3r+1.2

We move all terms to the left:

0.4r-0.6-(1.3r+1.2)=0

We get rid of parentheses

0.4r-1.3r-1.2-0.6=0

We add all the numbers together, and all the variables

-0.9r-1.8=0

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

-0.9r=1.8

r=1.8/-0.9

r=-2

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