30r-40=-70

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Solution for 30r-40=-70 equation:


30r-40=-70

We simplify the equation to the form, which is simple to understand 
30r-40=-70

We move all terms containing r to the left and all other terms to the right. 
+30r=-70+40

We simplify left and right side of the equation. 
+30r=-30

We divide both sides of the equation by 30 to get r. 
r=-1

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