-4=r(20)-5

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Solution for -4=r(20)-5 equation:


-4=r(20)-5

We simplify the equation to the form, which is simple to understand 
-4=r(20)-5

Reorder the terms in parentheses
-4=+(+20r)-5

Remove unnecessary parentheses
-4=+20r-5

We move all terms containing r to the left and all other terms to the right. 
-20r=-5+4

We simplify left and right side of the equation. 
-20r=-1

We divide both sides of the equation by -020 to get r. 
r=0.05

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