If (x+y,x-y)=(1,2) find x and y

Explanation

To solve the problem where \((x+y, x-y) = (1, 2)\), we can break it down into steps:

### Step 1: Set up the equations
From the given information, we can create two equations:
1. \(x + y = 1\) (Equation 1)
2. \(x - y = 2\) (Equation 2)

### Step 2: Add the two equations
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