Line R is represented by the following equation: x + y = 2
There are many such equations. For example, x - y = 0.
If it is not the answer you need, please tell me.
2x + y = 2
4x − 2y = 2
2x − 2y = 2
x + y = 4
The only variant which is satisfied by x=y=1 is the second (4x - 2y = 2). It is also not equivalent to x+y = 2, so completes the system.
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