Chiziqli tenglamalar sistemasi — 7-sinf Algebra test savollari

1.{2x + y = 7, x - y = 2} sistemaning yechimi (3; 1) ekanligini tekshiring. To'g'ri javobni tanlang.

• A)Yo'q, sistema yechimga ega emas
• B)Yo'q, faqat birinchi tenglamani qanoatlantiradi
• C)Ha, (3; 1) sistemaning yechimi
• D)Yo'q, faqat ikkinchi tenglamani qanoatlantiradi

2.{x + y = 5, x - y = 1} sistema uchun (2; 3) juftlik yechim bo'la oladimi?

• A)Yo'q, chunki x - y = 1 bajarilmaydi (2-3=-1)
• B)Yo'q, chunki x + y = 5 bajarilmaydi
• C)Ha, lekin faqat ikkinchi tenglama uchun
• D)Ha, ikkala tenglama ham bajariladi

3.{3x - y = 5, x + 2y = 4} sistema uchun (2; 1) juftlik yechimmi?

• A)Faqat birinchi tenglama uchun to'g'ri
• B)Yo'q
• C)Ha, sistemaning yechimi
• D)Faqat ikkinchi tenglama uchun to'g'ri

4.{2x + 3y = 12, x - y = 1} sistemada x = 3 bo'lsa, y ni toping (ikkinchi tenglamadan).

• A)1
• B)2
• C)4
• D)3

5.{x + y = 10, 2x - y = 2} sistemaning ikkala tenglamasini qo'shib, x ni topishga yordam beruvchi ifodani ayting.

• A)x = 12
• B)3y = 12
• C)3x = 8
• D)3x = 12

6.Ikki noma'lumli chiziqli tenglamalar sistemasi nechta tenglamadan iborat bo'ladi (odatiy holatda)?

• A)2 ta
• B)4 ta
• C)1 ta
• D)3 ta

7.{x = 2, y = 5} sistemaning yechimi qanday juftlik?

• A)(2; 2)
• B)(5; 2)
• C)(5; 5)
• D)(2; 5)

8.Sistemaning yechimi deb nimaga aytiladi?

• A)Tenglamalar sonini
• B)Faqat bitta tenglamani qanoatlantiruvchi son
• C)Sistemadagi barcha tenglamalarni qanoatlantiruvchi noma'lumlar juftligi
• D)Noma'lumlar sonini

9.{x + y = 6, x - y = 6} sistemada y ning qiymatini toping.

• A)0
• B)-6
• C)6
• D)3

10.{x + y = 7, x = 4} sistemada y ni toping.

• A)11
• B)7
• C)3
• D)4