if the average ( arithmetic mean ) of 2 x , 4 x , and 8 x is 140 , what is the value of x ?
"am of 2 x , 4 x and 8 x = 2 x + 4 x + 8 x / 3 = 14 x / 3 given that 14 x / 3 = 140 x = 30 answer is b"
subtract(multiply(4, const_2), multiply(2, const_2))