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Verified answer
(2 +3 + x +y) /4 = 5(5 +x +y ) = 20
x + y = 20 -5
x + y = 15
(3 + 8 +9 + x+ y ) / 5 =
(20 + (x+y) )/5 =
(20 + 15)/5=
= 35/5
= 7