`6r^2=6r+1`

Rearranging so it's in quadratic form:

`6r^2-6r-1=0`

Using the Quadratic Equation for the variable `r`:

`r=(-b+-sqrt(b^2-4ac))/(2a)`

`=(-(-6)+-sqrt((-6)^2-4(6)(-1)))/(2(6))`

`=(6+-sqrt(36+24))/12`

`=(6+-sqrt60)/12`

`=(6-2sqrt15)/12 or (6+2sqrt15)/12`

`=(3-sqrt15)/6 or (3+sqrt15)/6`

So

`r=-0.145 or 1.145`

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