Turn it into a quadratic equation...
...which I don't think is too tough:
Multiply out the left side:
Subtract 4x from both sides:
....add 5 to both sides:
So now it's in the classic quadratic equation form ax^2 +bx + c = 0,
where a = 1, b = -6, and c = 6.
And I'll bet you've seen these solved before...
the roots here are given by the familiar formula:
with roots 4.73 and 1.27 (rounded to 3 digits)