The difference of three times a number and three is twenty-one. find the number.

the difference is eight

First, turn your problem into an equation.

3x - 3 = 21

x represents the unknown number.

Your goal is to solve for x.

Start by adding 3 to both sides.

3x - 3 =  21

    + 3   + 3

3x = 24

Your next step is to divide by 3.

3x/3 = 24/3

x = 8

Your answer is 8.

Your welcome!

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680