12+r=

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Solution for 12+r= equation:


12+r=0

We simplify the equation to the form, which is simple to understand 
12+r=0

We move all terms containing r to the left and all other terms to the right. 
+1r=0-12

We simplify left and right side of the equation. 
+1r=-12

We divide both sides of the equation by 1 to get r. 
r=-12

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