1 - 1/1-1/2 = answer is -1

If 7/x=1 and y/4=6 then 3+x/3+y = answer is 10/27

3(a)(-b)(-c)(-d)+3abcd= answer is zero.

Four Right answers of book question series wise
IA, IIO, IIB, ICS, ICOM, IE, IM

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K Shaheen Banata Nahi Aashiyana.