exam Maths Puzzle Numerical Ability

Solve for x: log(4x + 8) - log 2=1
Im baffled.I have no idea what the second part means or even how to begin.

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exam Other Question

Explain why the radius of a regular polygon is greater than the opothem. Hello, I am needing some help in trying to figure out how to solve this equation: (x+b)(x-b)=-8 and x=1. Your help would be very much appreciated. Thankyou and have a good day.