A) 5
B) 12
C) 20
D) 24
Correct Answer: C
Solution :
\[a+b+5,2a+2b-1\] ?(1) \[a+b-5,2a+ab+1\] ?.(2) Add (1) and (2) \[a-b+5,2a-2b+5\] \[a+b+c=9\] So, \[4\times (x+y)=4\times 5=20.\]You need to login to perform this action.
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