If x/y = 4/5, the value of [8/5 + (y-x)/(y+x) is
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x/y=4/5
8/5 + (y-x)/(y+x)
(y-x)/(y+x) dividing numerator and denominator by y we get
(1-(x/y))/(1+(x/y))=(1-4/5)/(1+4/5)=1/9
8/5 + (y-x)/(y+x)=8/5+1/9=77/45
8/5 + (y-x)/(y+x)
(y-x)/(y+x) dividing numerator and denominator by y we get
(1-(x/y))/(1+(x/y))=(1-4/5)/(1+4/5)=1/9
8/5 + (y-x)/(y+x)=8/5+1/9=77/45
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