Solve the system of equations .
Solve the system of equations by following steps:
step0: Solve using the substitution method:
step1: Solve the equation:
step2: Substitute the value of
step3: Simplify:
step4: Solve the equation:
step5: Substitute the value of
step6: Multiply the terms:
step7: Multiply both sides of the equation by LCD:
step8: Simplify the equation:
step9: Move the constant to the right side:
step10: Remove 0:
step11: Divide both sides:
step12: Divide the numbers:
step13: Substitute the value of
step14: Simplify:
step15: Substitute the values of
step16: Simplify:
step17: Calculate:
step18: Check the solution:
step19: Rewrite:
The solution to the system of equations using the Gauss-Jordan method is .
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The Deep Dive
Bu tenglamalar sistemasini Gauss usuli yordamida yechish uchun, dastlab kengaytirilgan matritsa tuzishimiz kerak:
Birinchi qatorni o’zgartirishdan boshlaymiz. Birinchi qatordagi 1 ni 3-qator va 2-qator boyicha 0 ga aylantirish uchun, birinchi qatorni 3 marta ikkinchi qatordan ayiramiz. Natijada, 0 ni olish uchun 3 marta birinchi qatorni ikkinchiga qo’shamiz:
Keyin 3-qatordagi 4 ni 1 ga aylantirish uchun, 1-qatori 4 marta 3-qatordan ayiramiz:
Keling, endi 2-qatorni 1 ga kamaytirmoqchimiz. 2-qatorda -6 ni 1 ga aylantirish uchun 2-qatorni -1/6 ga bo’lamiz:
Endi, 3-qatorda 10 ni 0 ga aylantirish uchun, 2-qatorni 10 marta qo’shamiz:
Yana 3-qatorda -1/3 ni 1 ga aylantirish uchun, 3-qatorni 1 ga bo’lamiz:
Endi yuqori qatorlarga qaytib, x3 ni topamiz va keyin x2 va x1 ni hisoblaymiz. Natija: