Rewrite as a mathematical equation and solve: 3 less than the product of 5 and a number is 42. find the number.

5x-3=42. To solve you add three to both sides making the equation 5x=45. Then you divide both sides by five, and you get 9 as your answer.

its 4 because 2 times 2 is 4, if you double the number two you get four