r--7.7=-8.1

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Solution for r--7.7=-8.1 equation:


r--7.7=-8.1

We simplify the equation to the form, which is simple to understand 
r+7.7=-8.1

We move all terms containing r to the left and all other terms to the right. 
+1r=-8.1-7.7

We simplify left and right side of the equation. 
+1r=-15.8

We divide both sides of the equation by 1 to get r. 
r=-15.8

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