r-12=42

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Solution for r-12=42 equation:


r-12=42

We simplify the equation to the form, which is simple to understand 
r-12=42

We move all terms containing r to the left and all other terms to the right. 
+1r=+42+12

We simplify left and right side of the equation. 
+1r=+54

We divide both sides of the equation by 1 to get r. 
r=54

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