20=4r+8

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Solution for 20=4r+8 equation:


20=4r+8

We simplify the equation to the form, which is simple to understand 
20=4r+8

We move all terms containing r to the left and all other terms to the right. 
-4r=+8-20

We simplify left and right side of the equation. 
-4r=-12

We divide both sides of the equation by -04 to get r. 
r=3

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