63 less than four times a number is equal to the number. What is the number?

x = a number

4x - 63 = x

Subtract 4x from both sides.

-63 = -3x

Divide both sides by -3

21 = x

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.