What is the missing number that makes the equation true? Enter your answer in the box.
29 + 20 = 15 + 11 + ?

The missing number that makes the equation true is 23.

Step-by-step explanation:

29 + 20 = 15 + 11 +?

First, add 29 and 20. The sum is 49.

49 = 15 + 11 + ?

Next, add 15 and 11. The sum is 26.

49 = 26 + ?

Now, subtract 26 from 49. The difference is 23.

49 = 26 + 23

This is all that you technically need to do, but you can go ahead and add 26 and 23 if you'd like. This will give you a sum of 49 as well.

49 = 49

Hence, the missing number is 23.

image for option 4

step-by-step explanation:

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