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Pelajaran :MatematikaKelas :7
Bab :3
Nama Bab :Bentuk Aljabar - Materi
Kode mapel:2
Kode :7.2.3
Jawab:
5x-3y=26║3║ 15x-9y=78
3x+5y=36║5║15x+25y=180
_____________-
-34y=-102
y=3
5x-3y=26║5║25x-15y=130
3x+5y=36║3║ 9x+15y=108
____________+
34x=238
x=7
HP={x,y}
={7,3}
3x+5y = 36............ (x3)
25x-15y = 130
9x+15y = 108
____________ +
34x = 238
x = 7
3x+5y = 36
3(7)+5y = 36
21+5y = 36
5y = 15
y = 3
(x,y) = (7,3)