Question

The sum of 3consecutive multiples of5 is 240. Find the numbers​

Answer 1

Let the first multiple of 5 = x
Let the second multiple of 5 = x + 5
Let the third multiple of 5 = x + 10

According to question :

x + x + 5 + x + 10 = 240

3x + 15 = 240

3x = 240 - 15

3x = 225

x = 225/3

x = 75

The first multiple of 5 = x = 75

The second multiple of 5 = x + 5 = 75 + 5 = 80

The third multiple of 5 = x + 10 = 75 + 10 = 85

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Answer 2

Let the no.be X

Then and third number will be x+ 5 , x + 10

$x + x + x + 5 + x + 10 \\ \\ 3x = + 15 = 240 \\ \\ 3x = 240 - 15 \\ \\ 3x = 225 \\ \\ x = \frac{225}{3} = 75$

So the three multiple are 75 , 80 ,85