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(r/4)-1=4
We simplify the equation to the form, which is simple to understand
(r/4)-1=4
Simplifying:
( + 0.25r)-1=4
Remove unnecessary parentheses
+ 0.25r-1=4
We move all terms containing r to the left and all other terms to the right.
+ 0.25r=+4+1
We simplify left and right side of the equation.
+ 0.25r=+5
We divide both sides of the equation by 0.25 to get r.
r=20
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