One less than 3 times a number is 7

the number is 8/3 ( = 2 2/3)

Step-by-step explanation:

let the number be x

"3 times a number" - -> 3x

"one less than 3 times a number" - -> (3x - 1)

"one less than 3 times a number is 7" - -> (3x - 1) = 7 (solve for x)

3x - 1 = 7 (add 1 to both sides)

3x = 7 + 1

3x = 8 (divide both sides by 3)

x = 8/3

x = 8/3

Step-by-step explanation:

3x - 1 = 7

3x = 8

x = 8/3