A) 12
B) 2
C) 5
D) 24
Correct Answer: A
Solution :
\[\begin{matrix} x+y=5 \\ y+z=7 \\ +\,z+x=12 \\ \_\_\_\_\_\_\_\_\_\_\_\_\_ \\ 2(x+y+z)=24 \\ \end{matrix}\]\[\Rightarrow \] \[x+y+z=12\]You need to login to perform this action.
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