exam Maths Puzzle Numerical Ability

Help me please.
Solve log (x + 11) - log x = 3.

thank you

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exam Other Question

I need to find the indicated value of the piecewise-defined function

f(-8)for f(x)=3x if x <-1
x-6,if >-1 The first angle of a triangle is 15 degrees more than the second triangle. The third angle of a triangle is three times the second angle. Use x to represent the unknown Value.

? The first angle
? the second angle
? the third angle