What three consecutive integers have a sum of 1155?

Here we will use algebra to find three consecutive integers whose sum is 1155. We start by assigning X to the first integer. Since they are consecutive, it means that the 2nd number will be X + 1 and the 3rd number will be X + 2 and they should all add up to 1155. Therefore, you can write the equation as follows:

(X) + (X + 1) + (X + 2) = 1155

To solve for X, you first add the integers together and the X variables together. Then you subtract three from each side, followed by dividing by 3 on each side. Here is the work to show our math:

X + X + 1 + X + 2 = 1155
3X + 3 = 1155

3X + 3 - 3 = 1155 - 3
3X = 1152

3X/3 = 1152/3
X = 384

Which means that the first number is 384, the second number is 384 + 1 and the third number is 384 + 2. Therefore, three consecutive integers that add up to 1155 are 384, 385, and 386.

384 + 385 + 386 = 1155

We know our answer is correct because 384 + 385 + 386 equals 1155 as displayed above.

Three Consecutive Integers
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What three consecutive integers have a sum of 1156?
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