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1=r/4-2
We simplify the equation to the form, which is simple to understand
1=r/4-2
We move all terms containing r to the left and all other terms to the right.
-0.25r=-2-1
We simplify left and right side of the equation.
-0.25r=-3
We divide both sides of the equation by -00.25 to get r.
r=12
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