exam Maths Puzzle Numerical Ability

26:
[1/(x - 3)] + [1/(x + 3)] = [10/(x2 - 9)]

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exam Other Question

Ken makes a 4 mile motorboat tri downstream in 20 minutes (1/3hr)The return trip takes 30 minutes (1/2 hour). Find the rate of the boat in the water and the rate of the current. Another Geometry word problem that I cannot translate into algebra:

If two angles are supplementary, and the larger angle is 20 degrees less than three times the smaller angle, find the measure of each angle.