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Heyy...
Heyy... Your question has been answered in the attached pic.... hope this helps..
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a) x:y = 3:8
y:z = 4:9
x:z = 3:9
= 1:3
b) a:b = 2:3
b:c = 9:8
a:c = 2:8
= 1:4
c) a:b = 12:5
b:c = 15:8
a:c = 12:8
= 3:2
reciprocal of a:c is c:a = 2:3 ✔︎
Hope it helps brother :)
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