
Sustavi jednadžbi - metoda supstitucije
Presentation
•
Mathematics
•
1st Grade
•
Practice Problem
•
Hard
Filip Batrla
Used 4+ times
FREE Resource
5 Slides • 4 Questions
1
Sustavi dviju linearnih jednadžbi s dvije nepoznanice
2
Primjer 1:
U razredu je 28 učenika. Djevojčica ima za 5 više nego dječaka. Zapišite u bilježnicu rečenice u obliku linearnih jednadžbi s dvije nepoznanice.
3
Multiple Choice
Ivo i Marko imaju zajedno 15 sličica. Ivo ima dvostruko više sličica od Marka. Zapišite te rečenice u obliku sustava dviju linearnih jednadžbi s dvije nepoznanice, ako broj sličica koje ima Ivo označimo s x,, a broj sličica koje ima Marko označimo s y.
x−y=15 x=2y
x+y=15 y=2x
x+y=15 y=2+x
x+y=15 x=2y
4
Metoda supstitucije ili zamjene
Primjer 2: Riješi sustav jednadžbi
5
Multiple Choice
Metodom supstitucije riješi sustav:
x−y=−1
2x+3y=3
x=0, y=1
x=1, y=0
x=1, y=1
x=0, y=0
6
Metoda supstitucije ili zamjene
Primjer 3: Riješi sustav jednadžbi
7
Multiple Choice
Metodom supstitucije riješi sustav:
2x−y=−10
3x+2y=−1
x=3, y=4
x=-3, y=4
x=-3, y=-4
x=3, y=-4
8
Metoda supstitucije ili zamjene
Primjer 4: Riješi sustav jednadžbi
9
Multiple Choice
Metodom supstitucije riješi sustav:
7x−5y=−20
6x+3y=12
x=0, y=4
x=4, y=0
x=4, y=4
x=0, y=0
Sustavi dviju linearnih jednadžbi s dvije nepoznanice
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