If 2 / x = 3 / y = 4 / Z, then 3 / y is 2x + y-z= emergency
Let: 2 / x = 3 / y = 4 / z = K
So:
x=2k;y=3k;z=4k
simple form
=6K (4K + 3k-4k)
=3K / 6K
=1 / 2
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