" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
5x + 3y = 9 |kali 2| 10x + 6y = 18
2x - 4y = 14 |kali 5| 10x - 20y = 70
____________ _
26y = - 52
y = - 2
5x - 6 = 9
x = 3
maka:
x - y = 3 - (-2) = 5
2x-4y = 14 (dikali 3)
hasilnya :
20x+12y = 36
6x - 12y = 42 (ditambah)
-> 26x = 78
x = 3
substitusikan ke 5x + 3y = 9 , hasilnya y = -2
jadi (x-y) = 3 - (-2) = 5