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20-4r=-4(-5r-5)
We simplify the equation to the form, which is simple to understand
20-4r=-4(-5r-5)
Reorder the terms in parentheses
20-4r=+(+20r+20)
Remove unnecessary parentheses
+20-4r=+20r+20
We move all terms containing r to the left and all other terms to the right.
-4r-20r=+20-20
We simplify left and right side of the equation.
-24r=0
We divide both sides of the equation by -24 to get r.
r=-0
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