Algebramedium · Past Paper
Find the values of x and y for the system.
Ax=2, y=1
Bx=1, y=2
Cx=3, y=0
Dx=4, y=-1
✓ Correct Answer: A — x=2, y=1
Divide the first equation by 2 to get x + y = 3. Add to x - y = 1 to get 2x = 4, so x = 2 and y = 1.
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