9 + 3 = ? + 9
9 + 3 = 12
Since both sides equal the same thing, the question mark is a 3
9 +3 = 3 + 9
Thank you so much:-)
To find the value of the missing number in the equation 9 + 3 = ? + 9, we can start by simplifying the left side.
9 + 3 equals 12.
So, the equation becomes: 12 = ? + 9.
To isolate the missing number on one side of the equation, we need to subtract 9 from both sides.
12 - 9 equals 3.
Thus, the missing number in the equation is 3.
To verify the answer, you can substitute 3 back into the equation: 9 + 3 = 12, which is true.