9-4(2r-1)=45

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Solution for 9-4(2r-1)=45 equation:


9-4(2r-1)=45

We simplify the equation to the form, which is simple to understand 
9-4(2r-1)=45

Reorder the terms in parentheses
9+(-8r+4)=45

Remove unnecessary parentheses
+9-8r+4=+45

We move all terms containing r to the left and all other terms to the right. 
-8r=+45-9-4

We simplify left and right side of the equation. 
-8r=+32

We divide both sides of the equation by -8 to get r. 
r=-4

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