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6(1-6r)+4r=-218
We simplify the equation to the form, which is simple to understand
6(1-6r)+4r=-218
Reorder the terms in parentheses
+(+6-36r)+4r=-218
Remove unnecessary parentheses
+6-36r+4r=-218
We move all terms containing r to the left and all other terms to the right.
-36r+4r=-218-6
We simplify left and right side of the equation.
-32r=-224
We divide both sides of the equation by -32 to get r.
r=7
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