Al Muizzuddin FMatematika Ekonomi

Algebraic solution ofsimultaneous linear equations…

2016/6/28 2

At the end of this section youshould be able to:• Solve a system of two simultaneous linear equations in

two unknowns using elimination.• Detect when a system of equations does not have a

solution.• Detect when a system of equations has infinitely many

solutions.• Solve a system of three simultaneous linear equations in

three unknowns using elimination.

2016/6/28 3

Kelemahan Metode Grafik• Skala pengukuran yang rumit• Penentuan nilai axis y maupun x yang bentuknya angka

desimal• Banyaknya persamaan dalam ekonomi (bisa lebih dari

dua, tiga, bahkan empat)

2016/6/28 4

Elimination method

2016/6/28 5

Lanjut

2016/6/28 6

The method of elimination can besummarized as follows

2016/6/28 7

Contoh Soal (1)

2016/6/28 8

2016/6/28 9

2016/6/28 10

2016/6/28 11

2016/6/28 12

Contoh Soal (2)

2016/6/28 13

2016/6/28 14

2016/6/28 15

Contoh Soal (3)

2016/6/28 16

2016/6/28 17

2016/6/28 18

2016/6/28 19

2016/6/28 20

3 Persamaan Linear

2016/6/28 21

2016/6/28 22

2016/6/28 23

2016/6/28 24

2016/6/28 25

2016/6/28 26

2016/6/28 27

2016/6/28 28

2016/6/28 29

Contoh Soal (4)

2016/6/28 30

2016/6/28 31

2016/6/28 32

2016/6/28 33

2016/6/28 34

Stop..!

2016/6/28 35