-1/5=2r/5-2(-4r/5-2/5)

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Solution for -1/5=2r/5-2(-4r/5-2/5) equation:


-1/5=2r/5-2(-4r/5-2/5)

We simplify the equation to the form, which is simple to understand 
-1/5=2r/5-2(-4r/5-2/5)

Reorder the terms in parentheses
-0.2=0.4r+(+1.6r + 0.8)

Remove unnecessary parentheses
-0.2=0.4r+1.6r + 0.8

We move all terms containing r to the left and all other terms to the right. 
-0.4r-1.6r=0.8 + 0.2

We simplify left and right side of the equation. 
-2r=+1

We divide both sides of the equation by -2 to get r. 
r=-0.5

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