18. If x + y = a, y + z = b and z + x = c, the averageof x, y and z is:

2 answers:

6 0

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3 0

Answer:

Step-by-step explanation:

x y=a

z+x=c

hope this help

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18. If x + y = a, y + z = b and z + x = c, the averageof x, y and z is:​