The average of 5 consecutive multiples of 5 is 20 what is the largest of these numbers

Step-by-step explanation:

5 consecutive multiples of 5 ...

x, x + 5, x + 10, x + 15, x + 20

the average is 20 ...

(x + x + 5 x + 10 + x + 15 + x + 20) / 5 = 20

(5x + 50) / 5 = 20

5x + 50 = 20 * 5

5x + 50 = 100

5x = 100 - 50

5x = 50

x = 50/5

x = 10 ... smallest number

x + 5 = 10 + 5 = 15

x + 10 = 10 + 10 = 20

x + 15 = 10 + 15 = 25

x + 20 = 10 + 20 = 30 <== = largest number