Question

Let setM = {x, 2x, 4x} for any number x. If the average (arithmetic mean) of the numbers in set M is 14, what is the value of x ?

Answer 1

to get the mean, you add up the values and divide by 3

Answer 2

so because the values are x, 2x, 4x and because the mean is 14, we can set up this equation

\[\Large \frac{x+2x+4x}{3} = 14\]

I'll let you solve for x