-18=4r-9r

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Solution for -18=4r-9r equation:


-18=4r-9r

We simplify the equation to the form, which is simple to understand 
-18=4r-9r

We move all terms containing r to the left and all other terms to the right. 
-4r+9r=+18

We simplify left and right side of the equation. 
+5r=+18

We divide both sides of the equation by 5 to get r. 
r=3.6

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