MathQuiz
Question 87
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Cramer's Rule
Solve 2x+y=3, x-y=0
x=1,y=1
x=1,y=-1
x=0,y=3
x=2,y=-1
📖 Explanation
From x-y=0, x=y. Substitute: 2x+x=3, 3x=3, x=1, y=1.
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