โจทย์การหาคำตอบระบบสมการ

……….การแก้ระบบสมการเชิงเส้นสองตัวแปร ด้วยวิธีการแทนค่า

……..คำสั่ง  จงแก้ระบบสมการต่อไปนี้ .
……….1.    x + y = 20
……………       x = y – 4
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………..2.            y = –3x – 18
……………5x –2y = –8
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……….3.             x = 3y – 25
…………..4x + 5y = 19
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……..4.  4x – 3y = 33
…………           .x = – 4y – 25
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……..5.   9x – 2y = –38
…………           .y = –5x
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About krutubtim

teacher

Posted on 27 สิงหาคม, 2016, in บทที่ 3 ระบบสมการม.3. Bookmark the permalink. ใส่ความเห็น.

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