-12=-4r

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Solution for -12=-4r equation:


-12=-4r

We simplify the equation to the form, which is simple to understand 
-12=-4r

We move all terms containing r to the left and all other terms to the right. 
+4r=+12

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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