12=-7r+r

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Solution for 12=-7r+r equation:


12=-7r+r

We simplify the equation to the form, which is simple to understand 
12=-7r+r

We move all terms containing r to the left and all other terms to the right. 
+7r-1r=-12

We simplify left and right side of the equation. 
+6r=-12

We divide both sides of the equation by 6 to get r. 
r=-2

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