Question
Mathematics Question on Solution of a Linear Equation
If the system of equations x-y=1, ax+y= 2 has unique solution then
A
a=1
B
a=-1
C
a≠1
D
a≠-1
Answer
a≠-1
Explanation
Solution
The correct option is (D): a≠-1.
If the system of equations x-y=1, ax+y= 2 has unique solution then
a=1
a=-1
a≠1
a≠-1
a≠-1
The correct option is (D): a≠-1.