3r+(-12)=-57

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Solution for 3r+(-12)=-57 equation:


3r+(-12)=-57

We simplify the equation to the form, which is simple to understand 
3r+(-12)=-57

Remove unnecessary parentheses
+3r-12=-57

We move all terms containing r to the left and all other terms to the right. 
+3r=-57+12

We simplify left and right side of the equation. 
+3r=-45

We divide both sides of the equation by 3 to get r. 
r=-15

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