A) \[x=2,y=-5\]
B) \[x=1,y=2\]
C) \[x=2,\,y=-1\]
D) \[x=-1,y=2\]
Correct Answer: C
Solution :
Given system of linear equations is \[x+y=1\] ?.(i) \[x-2y=4\] ??(ii) On subtracting Eq. (i) from EQ. (II), we get \[\begin{align} & x+y=1 \\ & x-2y=4 \\ & -\,\,\,\,\,\,+\,\,\,\,\,\,\,\,- \\ & \_\_\_\_\_\_\_\_ \\ & 3y=-3 \\ \end{align}\] \[y=-1\] On putting \[y=-1\]in Eq. (i) we get \[x-1=1\] \[\Rightarrow \] \[x=2\]You need to login to perform this action.
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