exam Maths Puzzle Numerical Ability

I need help simplifying mixed quotients.
Simplify the complex fraction. 9+3/x
_________

x/4+ 1/12

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exam Other Question

3 logb x = logb 64

I do not understand this problem. I have a quiz coming up Wednesday. I need someone to help me with this problem. My brain hurts. Can someone please help me?
Write the equation of the line with slope 2/3 and y-intercept (0, 5). Then graph the line.