Question

Find three consecutive integers such that the sum of the first and the third is 40.

Answer 1

19,20,21

Explanation:

So, when we have 3 consecutive numbers, we are going to have x, x+1, and x+2. So, that means 40=x+x+2.

40=2x+2

38=2x

x=19

So, now that we know x is 19, we can just use our numbers that we had earlier when we were making the consecutive numbers. So, it's 19,20, and 21.

Answer 2

19, 20, and 21

Explanation:

Well, we can look for two numbers, one which is two larger than the other.

So, it would look like: 40 = x + (x + 2)

Simplify: 2x + 2 = 40

Subtract: 2x = 38

Divide: x = 19

So, the three numbers will be 19, 20, and 21.