Equations x + y = -10 and x - y = -2 represent the situation.
Given information;
Robert is thinking of two numbers that have a sum of -10 and a difference of -2.
The equations to represent the situation are;
Let,
The number 1 is 'x'.
The number 2 is 'y'.
The sum of the numbers,
x + y = -10 → (I)
The difference in the numbers,
x - y = -2 → (II)
Therefore, Equations (I) and (II) represent the situation.
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