is it -2 ?
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Answer:
Step-by-step explanation:
2 2/3 = 8/3
24 ÷ 8/3
= 9
The two numbers being added are 12 and 11
23-17=6
6x2=12
12+<u>?</u>=23 ⇒ 23-12=11
12+11=23