P=x+y+z/2 and (p-x):(p-y):(p-z)= 3:5:7 find x:y:z
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P = x+y+z ÷2
(P-x)=3 [ Putting the value of P]
=>-x+y+z=6-------->(I)
(P-y)=5
=>x-y+z=10-------(II)
(P-z)=7
=>x+y-z=14-------(III)
(I)+(II)+(III),
x+y+z=6+10+14=>30
P = x+y+z ÷2
=>P=30÷2=>15
(P-x)=3
=>x=12
(P-y)=5
=>y=10
(P-z)=7
=>z=8
So, x:y:z=12:10:8
=>6:5:4
I hope it will help you .
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