r=4,

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Solution for r=4, equation:


r=4, 

We simplify the equation to the form, which is simple to understand 
r=4,

We move all terms containing r to the left and all other terms to the right. 
+1r=+4

We simplify left and right side of the equation. 
+1r=+4

We divide both sides of the equation by 1 to get r. 
r=4

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