r*20-91=669

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Solution for r*20-91=669 equation:


r*20-91=669

We simplify the equation to the form, which is simple to understand 
r*20-91=669

Simplifying:
+20r-91=669

We move all terms containing r to the left and all other terms to the right. 
+20r=+669+91

We simplify left and right side of the equation. 
+20r=+760

We divide both sides of the equation by 20 to get r. 
r=38

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