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Ax+by=c
Anggap di substitusikan a=1 b=2 c=1
Maka,
X+2y=1
Anggapan ke 2
A=2
B=3
C=2
2x+3y= 2
Lalu di substitusikan
X+2y=1 dikali 2
2x+3y=2 dikali 1
_________
2x+4y=2
2x+3y=2
__________ _
Y=0
X=1
Lalu ax+by=c
A.1 +b.0 = c
A+b=c