Math, asked by nilanshchoubisa2007, 11 months ago

pls answer clearly for Olympiad

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Answered by Anonymous

2

Answer:

y= -1

Step-by-step explanation:

x+y=7

x= 7-y

now x^2 -y^2 =28

(y-7)^2 -y^2 =28

by solving

y=-1

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