Which of the following pairs of equations is inconsistent?
2x+3y=15, 4x+7y=11
4x+y=12, 8x+2y=24
x+2y=5, 2x+4y=15
11y+3x=1, 5y+2x+7
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4
Answer:
1. consistent
2. consistent
3. inconsistent
4. consistent
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