18. x +y = 2xy, * - y = 6x
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Step-by-step explanation:
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0
Answer:
x+y=2xy
if taking condition that, x=y=1
then, x+x=1+1=2
2xy=2×1×1=2
then _(-y)= 6x
6x+y=_
putting the value of x and y as 1
6x+y=(6×1)+ 1=7
answer is 7
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