One number is 3 times a first number. a third number is 100 more than the first number. if the sum of the three numbers is 215, find the numbers.

23, 69 and 123

Step-by-step explanation:

let the first number be x then the second number is 3x ( 3 times the first) and the third number is x + 100 ( 100 more than the first number)

The sum of the three numbers is

x + 3x + x + 100 = 215

5x + 100 = 215 ( subtract 100 from both sides )

5x = 115 ( divide both sides by 5 )

x = 23

The 3 numbers are

x = 23, 3x = 3 × 23 = 69 and x + 100 = 23 + 100 = 123

-8

step-by-step explanation:

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.