Question

The sum of a number and the two numbers preceding it is equal to 30. find the number

Answer 1

let the number be x.
x + (x-1) + (x-2) =30
x +x-1+x-2 =30
3x - 3 = 30
3x = 30+3=33
x=33/3
x=11

Answer 2

Answer:

11

Step-by-step explanation:

Let the number be x

So, its preceding number = x-1

next preceding number = x-2

Since we are given that The sum of a number and the two numbers preceding it is equal to 30

So, x+x-1+x-2=30

3x-3=30

x-1=10

x=11

Hence the number is 11.