Answer: =1
Step-by-step explanation:









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The two cases are :
or
- a -4 = 0, that leads to a = 4
We can conclude :

Answered by : ❝ AǫᴜᴀWɪᴢ ❞
The keyword is "sum" which tells you x, y, and z are being added. One half of the sum means that the sum of the three numbers is going to be divided by 2.
x + y + z
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2