
HD QZ PPTHE OK

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Mathematics
•
9th Grade
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Medium

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3 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Từ pt 1 ta biểu diễn x theo y ta được
x=5-2y
x=5+2y
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khi rút x từ pt 1 thay vào pt 2 ta được pt
3(5-2y)-4y=-5
3(5+2y)-4y=-5
3.
MULTIPLE CHOICE QUESTION
30 sec • Ungraded
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