8r+4+4r+8=15r-9

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Solution for 8r+4+4r+8=15r-9 equation:


8r+4+4r+8=15r-9

We simplify the equation to the form, which is simple to understand 
8r+4+4r+8=15r-9

We move all terms containing r to the left and all other terms to the right. 
+8r+4r-15r=-9-4-8

We simplify left and right side of the equation. 
-3r=-21

We divide both sides of the equation by -3 to get r. 
r=7

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