exam Maths Puzzle Numerical Ability

The area of a rectangle increased by 5 is equal to 40 decreased by 4 times the area. Let a stand for the area. Solve for a.

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Not sure if this is right

7. (2 pts)
Two balls are to be selected without replacement from a bag containing one red, one blue, one green, one yellow, and one black ball. How many points are there in the sample space? 5*4 = 20 ??
sqrt of x-2=1

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