exam Maths Puzzle Numerical Ability

I am having problems with this solution:

Solve for x: log(x - 5) + log 4 = 2

Please help. Thanks
-Ryan

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exam Other Question

20 simplify: 24s/3s If a triangle of base 14 units has the same area as a circle that has a radius of 14 units, find the height of the triangle. Use. 3.14 for pi.