exam Maths Puzzle Numerical Ability

Why is it possible that the averagage/ean can be lower then the mode

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exam Other Question

Which is the best approximation of the solution of the equation:
-2.9n - 4.89 = 1.75(n + 14.5)?

A. -17.81 B. -6.51
C. -4.55 D. -4.41
Rewrite the equation so that y is a function of x

Please explain and show work on each step so that I will fully understand this for the future problems that I have. THANK YOU!

3(x-2y) = -12(x+2y)