r=0.9r+30

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Solution for r=0.9r+30 equation:


r=0.9r+30

We simplify the equation to the form, which is simple to understand 
r=0.9r+30

We move all terms containing r to the left and all other terms to the right. 
+1r-0.9r=+30

We simplify left and right side of the equation. 
 + 0.1r=+30

We divide both sides of the equation by 0.1 to get r. 
r=300

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