A) \[x+y=14\]
B) \[x-y=14\]
C) \[3x+4y=63\]
D) \[{{x}^{2}}-{{y}^{2}}=21\]
Correct Answer: A
Solution :
(a): \[4+y+6+x+11=35\] \[\Rightarrow \,\,x+y=14\]
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