One number is 5 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 555 , find the numbers ...

first = 65

second = 325

Third = 165

Step-by-step explanation:

Let the first number = x

first: x

second: 5x

Third = x + 100

first + second + third = 555

x + 5x + x + 100 = 555 Combine

7x + 100 = 555 Subtract 100 from both sides

7x + 100 - 100 = 555 - 100

7x = 455 Divide by 7

7x/7 = 455/7

x = 65