-8r-9=-2r+7(-6r+9)

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Solution for -8r-9=-2r+7(-6r+9) equation:


-8r-9=-2r+7(-6r+9)

We simplify the equation to the form, which is simple to understand 
-8r-9=-2r+7(-6r+9)

Reorder the terms in parentheses
-8r-9=-2r+(-42r+63)

Remove unnecessary parentheses
-8r-9=-2r-42r+63

We move all terms containing r to the left and all other terms to the right. 
-8r+2r+42r=+63+9

We simplify left and right side of the equation. 
+36r=+72

We divide both sides of the equation by 36 to get r. 
r=2

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