Solve: 2x + y = 8 and x − y = 1.
Ax = 3, y = 2CORRECT
Bx = 2, y = 4
Cx = 4, y = 0
Dx = 1, y = 0
GCEMathematics
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Why the answer is A, and why the others tempt you.
Add: 3x = 9 → x = 3. Substitute: 3 − y = 1 → y = 2.
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