Question

If x+y = 5 and y-x = 7, then the value of y/x is


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Answer 1

x+y=5.......(1)

x−y=7.........(2)

Adding equations(1) and (2), we get

x+y+x−y=5+7

2x=12⟹x=6

Now putting this value of x in equation (1), we get y=-1

So, x=6,y=−1(solution)